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19000138.10A.QXD 11/11/99 8:46 AM Page 2 Software Version 4.01 or above Internal Database Version 3.00 © GARMIN Corporation G-chart TM cartridge data is copyrighted by Navionics Corporation and GARMIN Corporation and may not be copied or used for any other purpose without permission. © 1999 GARMIN Corporation GARMIN International, Inc. 1200 E. 151st Street, Olathe, KS 66062, USA Tel: 913.397.8200 or 1.800.800.1020 Fax: 913.397.8282 Website: www.garmin.com GARMIN (Europe) Ltd.
19000138.10A.QXD 11/11/99 8:46 AM Page i INTRODUCTION Warning Warning The GPSMAP 235 Sounder should not be used as a navigational aid or depth sounder to prevent collision, grounding, or boat damage, any of which could result in personal injury. For reasons of safety, we also recommend that you operate your boat at very slow speed if you suspect shallow water or submerged objects.
19000138.10A.QXD 11/11/99 8:46 AM Page ii INTRODUCTION Cautions CAUTION! The GARMIN GPSMAP 235 Sounder has no user-serviceable parts. Should you ever encounter a problem with your unit, please take it to an authorized GARMIN dealer for repairs. Any attempt to open the case to change or modify the unit in any way will void your warranty and may result in permanent damage to the equipment.
19000138.10A.QXD 11/11/99 8:46 AM Page iii Designed for detailed electronic charting and complete depth sounding capability, the GARMIN GPSMAP 235 Sounder is a powerful navigation device that also gives you the fishfinding information you need in fresh or saltwater.
19000138.10A.QXD 11/11/99 INTRODUCTION Warranty 8:46 AM Page iv Limited Warranty GARMIN warrants this product to be free from defects in materials and manufacture for one year from the date of purchase. GARMIN will, at its sole option, repair or replace any components which fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor. The customer is, however, responsible for any transportation costs.
19000138.10A.QXD 11/11/99 8:46 AM Page v Preface Congratulations on choosing one of the most advanced depth sounding and marine navigation systems available. The GARMIN GPSMAP 235 Sounder combines the proven performance of GARMIN GPS, powerful G-Chart electronic charting, and full featured depth sounding into one unit to create an unsurpassed marine navigation and fishfinding package.
19000138.10A.QXD 11/11/99 INTRODUCTION Packing List 8:46 AM Page vi Before installing and using with your sounder, please check to see that your package includes the following items. If any parts are missing, please contact your GARMIN dealer immediately. *Standard Package: • GPSMAP 235 Sounder • External GPS Antenna and 30’ cable • Power/Data Cable • Mounting and Gimbal Bracket • Owner’s Manual • Quick Reference Card *For assembly part number 010-00119-01, a transom mount transducer is included.
19000138.10A.QXD 11/11/99 8:46 AM Page vii Warning ..................................................................................................................i Cautions.................................................................................................................ii Capabilities/Warranty .........................................................................................iii-iv Preface/Packing List ..............................................................................
19000138.10A.QXD 11/11/99 8:46 AM Page viii INTRODUCTION Keypad Usage The GPSMAP 235 Sounder’s advanced keypad system is designed to allow for fast, convenient selection of navigation options and data entry. The getting started tour will introduce you to the keypad and provide a ‘hands-on’ lesson in using the sounder. We strongly encourage you to take the getting started tour before using your unit for actual navigation and fishing.
19000138.10A.QXD 11/11/99 8:46 AM Page 1 Initializing the Receiver Before you use your GPSMAP 235 for the first time, you’ll need to “initialize the receiver.” Initialization is the process in which the receiver collects satellite data and establishes its (your) present position. Follow the initialization process described below, which will usually provide a position fix in about a minute.
19000138.10A.QXD 11/11/99 8:46 AM Page 2 Initializing the Receiver (con’t.) GETTING STARTED Initialization The Map Page will appear, prompting you to select your approximate present position with the map cursor. 1. Use the R keypad to move the map cursor to a location close to your present position. If you have difficulty identifying your exact position, use the I key to zoom to a lower map scale. 2. Press T to confirm your selection. A B A.
19000138.10A.QXD 11/11/99 8:46 AM Page 3 Getting Started Tour The GARMIN GPSMAP 235 Sounder is a powerful electronic navigation and depth sounding system that provides detailed chart coverage and convenient control of many advanced features right from the screen display. This tour is designed to take you through the basic pages and functions of the system using the simulator mode.
19000138.10A.QXD 11/11/99 8:46 AM Page 4 Status Page GETTING STARTED Status Field Status Page/Simulator Mode Horizontal Accuracy Satellite Sky View Dilution of Precision Signal Strength Indicators Status Bar A B A. To start the simulator, confirm the simulator warning. Do not use simulation for actual navigation or to determine actual water depth. B. Whenever the sounder is in simulator mode, a ‘Setup Simulator?’ option will appear on the options menu for each page.
19000138.10A.QXD 11/11/99 8:46 AM Page 5 GETTING STARTED Page Sequence/Position Page The satellite Status Page is one of five main pages used in the sounder. All five pages are linked together in a simple chain, which allows you to scroll through the pages in either direction using the J and Q keys. To continue the tour, let’s move on to the next page, the position page. To scroll to the next page in sequence: 1. Press the J key.
19000138.10A.QXD 11/11/99 8:46 AM Page 6 Marking a Position GETTING STARTED Using Marking the a GOTO Position Key To mark your present position: 1. Press the M key. The mark position page will appear, with a default three-digit waypoint name, symbol, position, and depth. 2. Use the R keypad to highlight the waypoint name field (001) and press T. 3. Press the LEFT ARROW of the R keypad to clear the name field. 4.
19000138.10A.QXD 11/11/99 8:47 AM Page 7 Sounder Page Data Field GETTING STARTED Range Mode Sounder Page Fish Arch Thermocline Whiteline Transducer Frequency The Sounder Page lets you use the GPSMAP 235 as a fishfinder. The top of the screen contains any of seven selectable data field options, while the middle of the page contains a right-to-left moving sonar image of the water beneath your boat. (Note: Items appear on the screen as they pass under your transducer.
19000138.10A.QXD 11/11/99 8:47 AM Page 8 Range Modes GETTING STARTED Range Modes The unit uses three range modes on the Sounder Page: auto, manual, and window. Auto mode displays the most information possible while continuously showing the bottom. Manual mode lets you select the displayed depth. Window mode allows you to define a starting depth and length of the range window,. but must be started from the sounder options menu (see page 31). To switch from auto to manual mode: 1.
000138.10A.QXD 11/11/99 8:47 AM Page 9 Zoom Feature The zoom feature allows you to view a smaller portion of the complete range in greater detail. The zoom feature operates in auto or manual mode. Auto zoom will follow the bottom contour while manual zoom will display the selected depth. For more on the zoom feature, see pages 26-27. GETTING STARTED Zoom Feature To use the zoom feature: 1. While viewing the Sounder Page, press I.
19000138.10A.QXD 11/11/99 8:47 AM Page 10 Map Page GETTING STARTED Data Fields Map Page Boat Symbol Map Scale The Map Page combines digital chartplotting with a user-selectable display of navigation data, and a built-in worldwide database. It will also be the page you use most to create and edit waypoints and routes. Before we take off on a practice route, let’s take a brief look at its various features and displays. A B A.
19000138.10A.QXD 11/11/99 8:47 AM Page 11 Using the Map Cursor The cursor is an important tool that can be used to pan to other map locations, mark and edit waypoints and routes, and review position data of on-screen navaids and waypoints. To get a feel for using the Map Page and cursor, try the following exercise: GETTING STARTED Map Cursor 1. Use the H key to set the map scale to the 64 nm setting. Your boat should be near the center of the map. 2.
19000138.10A.QXD 11/11/99 8:47 AM Page 12 Going to a Destination GETTING STARTED Using the GOTO Feature GPS is all about marking positions as waypoints and navigating to them using the receiver’s steering guidance and map displays. We’ve already seen how to use the M key to store our present position, so it’s time to move on to the fun part— going to a destination.
19000138.10A.QXD 11/11/99 8:47 AM Page 13 Going to a Destination (con’t.) A data field at the top of the page will now display the bearing and distance to the second route waypoint. To get started, let’s enter a speed for our vessel, which we can do from the ‘Setup Simulator?’ listing on the map options menu. The setup simulator page is available from any page in the main page sequence. GETTING STARTED Simulator Setup To enter a boat speed: 1. Press the O key to display the map options menu. 2.
19000138.10A.QXD 11/11/99 8:47 AM Page 14 Going to a Destination (con’t.) GETTING STARTED Reviewing and Creating Waypoints on the Map Now that we’ve zoomed in a little closer to our route, we can pan ahead of our vessel with the cursor to review and create on-screen waypoints and navaids. Try moving the cursor to select the ‘TOUR3’ waypoint— just use the R keypad to move the cursor as close as possible to the waypoint. (To move the cursor in small increments, try a series of short key presses.
19000138.10A.QXD 11/11/99 8:47 AM Page 15 Navigation Page GETTING STARTED Data Fields Overview Compass Tape Graphic Highway Pointer to Waypoint CDI Scale The Navigation Page provides graphic steering guidance to your destination. The bearing (BRG) and distance (DIS) to the destination, with your current course (COG) and speed over ground (SOG), are displayed at the top of the page, along with a compass tape to indicate your cardinal heading.
19000138.10A.QXD 11/11/99 8:47 AM Page 16 Navigation Page (con’t.) GETTING STARTED Using the Navigation Page To adjust the simulated boat speed: 1. Press the UP arrow of the R keypad to increase the speed in 5 knot/kph/mph increments. Press the DOWN arrow to decrease the speed in the same increments. To steer the boat: 1. Press the LEFT or RIGHT arrows of the R keypad. Notice that as you get off course, the highway and waypoint pointer move to give you graphic guidance to get back on course.
19000138.10A.QXD 11/11/99 8:47 AM Page 17 Active Route Page The active route page shows each waypoint of the active route in sequence, with the waypoint name, distance and estimated time enroute to each waypoint displayed. As you navigate the route, the active route list will be automatically updated, indicating the next destination waypoint.
19000138.10A.QXD 11/11/99 8:47 AM Page 18 Main Menu Page GETTING STARTED Main Menu and Power Off The main menu page’s eleven submenus are divided into categories by function. You can select a particular submenu by simply highlighting the desired option and pressing T. To get a feel for how the main menu page works, let’s clear out the track log we’ve created during our simulated tour. Clearing the track log will ensure that you have a clean slate once you start navigating in your home waters.
19000138.10A.QXD 11/11/99 8:47 AM Page 19 Status Page STATUS PAGE Status Field Horizontal Accuracy Overview Satellite Sky View SECTION 1 Dilution of Precision Signal Strength Indicators Status Bar The Status Page provides a visual reference of various receiver functions, including current satellite coverage, receiver operating mode and current receiver accuracy. The status information will give you an idea of what the receiver is doing at any given moment.
19000138.10A.QXD 11/11/99 8:47 AM Page 20 Receiver Status, EPE and DOP SECTION 1 STATUS PAGE Receiver Status Receiver status is displayed at the top of the page, with the current estimated position error (EPE) and dilution of precision (DOP) to the left of the sky view. DOP is an indication of satellite geometry quality measured on a scale of one to ten (lowest numbers the best, highest numbers the poorest). EPE uses DOP and other factors to calculate a horizontal position error in feet or meters.
19000138.10A.QXD 11/11/99 8:47 AM Page 21 Satellite Status Page Options The satellite Status Page features an options menu that provides access to functions and features relating to the Status Page. STATUS PAGE SECTION Initialize Position, AutoLocate, North Up, and Setup Simulator 1 To display the Status Page options menu: 1. From the Status Page, press O. There are four options: • Initialize Position?: Allows you to initialize the receiver graphically or by text.
19000138.10A.QXD 11/11/99 8:47 AM Page 22 Position Page SECTION 2 POSITION PAGE Overview Compass Tape Data Fields Position Coordinates Time of Day The trip odometer can be reset from the Position Page options menu. To reset the odometer, select the ‘Reset Trip Distance?’ option and press EDIT/ENTER. 22 Status Bar The position page shows your position, direction, and speed.
19000138.10A.QXD 11/11/99 8:47 AM Page 23 Position Page Options The position page features an options menu that provides access to functions and features relating to the position page. To display the position page options menu: 1. Press O. POSITION PAGE SECTION Trip Distance, Date Fields, Restore Defaults, and Simulator Setup 2 There are four options: • Reset Trip Distance?: Resets the trip odometer (TRP) field to zero.
19000138.10A.QXD 11/11/99 8:47 AM Page 24 Sounder Page SECTION 3 SOUNDER PAGE Range Mode Data Field Overview Fish Icon Whiteline Black Line Thermocline Status Bar A B A. The right side of the screen represents the transducer’s location on your boat. Items appearing on the right side of the screen were passed by more recently than those on the left. B. The four-level gray LCD screen makes it possible to easily separate sonar targets from their surroundings.
19000138.10A.QXD 11/11/99 8:47 AM Page 25 Range Modes SECTION The sounder features three depth range modes: auto, manual, and window. Auto is the default setting and continually adjusts the screen display to show the maximum amount of detail possible, while always showing the bottom; manual allows you to adjust the sonar display’s depth using the R keypad; window lets you establish a starting depth (top) and length (span) for the sonar display.
19000138.10A.QXD 11/11/99 8:47 AM Page 26 Zoom Feature SECTION 3 SOUNDER PAGE Zoom Feature The zoom feature allows you to view a smaller portion of the complete range in greater detail. The zoom feature operates in auto or manual mode. Auto zoom will follow the bottom contour while manual zoom will display the selected depth. For more on the zoom feature, see pages 26-27. To use the zoom feature: 1. While viewing the Sounder Page, press I.
19000138.10A.QXD 11/11/99 8:47 AM Page 27 Zoom Window Depth Scale SOUNDER PAGE Once a zoom window is displayed, it’s depth scale can be adjusted. A hollow indicator bar is displayed to the left of the depth scale on the original picture (top half of the screen). The depth scale of the zoom window corresponds to the range set by the indicator bar. To adjust the depth scale of the zoom window, simply use the arrow keypad and move the indicator bar up or down setting it to the desired range.
19000138.10A.QXD 11/11/99 8:47 AM Page 28 Map/Sounder Page Split Screen SECTION 3 SOUNDER PAGE Map/Sounder Split Screen The sounder can display a split screen view of the sounder window and Map Page. The split screen feature is turned on from the Map Page. To view the split screen: A B 1. Press J until the Map Page appears. 2. Press O to display the Map Page options menu. A. The split screen display is activated from the Map Page. B.
19000138.10A.QXD 11/11/99 8:47 AM Page 29 Sounder Page Options SECTION The Sounder Page options menu lets you customize the sounder’s features to suit your needs. SOUNDER PAGE Sensitivity To display the Sounder Page options menu: 3 1. From the Sounder Page, press O. The following options are available: • Sensitivity Adjust?: Sensitivity controls the sounder’s ability to show echoes without introducing interference.
19000138.10A.QXD 11/11/99 8:47 AM Page 30 Sounder Page Options (con’t.) SECTION 3 SOUNDER PAGE Whiteline, Chart Speed, Range Mode • Whiteline Adjust: Whiteline indicates the relative hardness or softness of the bottom. The bottom itself is shown as a continuous black line, while the whiteline shows up as a light gray band just below. The whiteline becomes thicker or thinner depending on bottom hardness.
19000138.10A.QXD 11/11/99 8:47 AM Page 31 Sounder Page Options (con’t.) SOUNDER PAGE Auto is the default setting and continually adjusts the screen display to show the maximum amount of detail possible, while always showing the bottom. Manual allows you to adjust the sonar display’s depth using the R keypad. Window lets you establish a starting depth (top) and length (span) for the sonar display. Range Mode and Page Display SECTION 3 To set the range mode: 1.
19000138.10A.QXD 11/11/99 8:47 AM Page 32 Sounder Page Options (con’t.) SECTION 3 SOUNDER PAGE Data Fields and Restore Defaults • Change Data Fields?: Allows you to specify the data displayed in each data field on the Sounder Page.
19000138.10A.QXD 11/11/99 8:47 AM Page 33 Sounder Setup Page SECTION The next Sounder Page menu option is ‘Sounder Setup?’ which accesses the sounder setup page. There are eight fields on the sounder setup page which allow you to customize the sounder’s features: Fish ID, Target Depth, Water Temperature, Water Type, Noise Rejection, Keel Offset, Frequency, and Speed Calibration. SOUNDER PAGE Fish ID Setup 3 To access the sounder setup page: 1.
19000138.10A.QXD 11/11/99 8:47 AM Page 34 Sounder Setup Page (con’t.) SECTION 3 SOUNDER PAGE Fish ID and Water Temperature Setup To select Fish ID: 1. Highlight the ‘FISH ID’ option and press T. The ‘FISH ID’ submenu will appear. 2. Highlight the desired setting and press T. • Target Depth: Displays the digital depth of each fish symbol. • On: Shows fish symbols with corresponding digital depth. • Off: Does not display depth. To select target depth: 1.
19000138.10A.QXD 11/11/99 8:47 AM Page 35 Sounder Setup Page (con’t.) SOUNDER PAGE • Noise Rejection: Removes cross talk from other sounders or ignition noise from poor boat motor installations (non-shielded plugs, etc.). Noise Rejection and Keel Offset Setup There are three options: SECTION 3 • Off: The unit will not remove anything it thinks is cross talk noise. The noise will be displayed on the screen.
19000138.10A.QXD SECTION 3 11/11/99 8:47 AM Page 36 SOUNDER PAGE Transducer Frequency and Speed Calibration Setup Sounder Setup Page (con’t.) There are four options: • 200 kHz: Best suited for shallow, inland waters where deep water performance is not critical and bottom detail and resolution is the highest priority. • 50 kHz: For maximum deepest readings. Note: Maximum readable depths in saltwater will be 25% - 50% less than freshwater depths, because of saltwater attenuation of the sonar signal.
19000138.10A.QXD 11/11/99 8:47 AM Page 37 Sounder Setup Page (con’t.) GETTING STARTSOUNDER PAGE ED Speed Calibration Setup To use Auto Calibration: 1. Ensure ‘Auto Calibrate?’ is displayed in the speed calibration field. If it is not, press O to display the calibration menu. Using the GOTO Key 2. Highlight ‘Auto Calibrate’ and press T. SECTION 3 3. Press T again and an instruction message will appear. 4. Read the instructions and press T when you are ready to begin calibration. 5.
19000138.10A.QXD SECTION 3 11/11/99 8:47 AM Page 38 GETTING STARTSOUNDER PAGE ED and Speed Calibration Simulator Using the Setup GOTO Key Sounder Setup Page (con’t.) To use manual calibration: 1. Ensure manual calibration mode is selected in the speed calibration field. If not, press O, highlight ‘Manual Calibrate?’, and press O. 2. Press T. The slider bar will turn black and the calibration range bar will turn white. 3.
19000138.10A.QXD 11/11/99 8:47 AM Page 39 Map Page GETTING STARTMAPEDPAGE Overview Data Window Using the GOTO Key SECTION 4 Boat Icon Map Scale Status Bar The Map Page provides a comprehensive display of electronic cartography, plotting and navigational data. The map display shows your boat on a digital chart, complete with geographic names, navaids, depth contours and other chart features. It also plots your track and displays any routes and waypoints you create.
19000138.10A.QXD SECTION 4 11/11/99 8:47 AM GETTING STARTMAPEDPAGE Mapthe Modes Using GOTO Key Page 40 Map Modes There are two map operating modes: the position mode and the cursor mode. When the map is in the position mode, the position marker pans the cartography to keep itself within the display area. When the map is in the cursor mode, the cursor pans the cartography to keep the itself within the display area.
19000138.10A.QXD 11/11/99 8:47 AM Page 41 Using the Cursor GETTING STARTMAPEDPAGE Using the Cursor The cursor allows you to pan away from your present position and scroll to other map areas (even outside of your current G-chart coverage). As you pan past the edge of the current map display, the screen will actively scroll forward to provide continuous map coverage. Using the GOTO Key SECTION 4 To move the cursor: 1. Press the R keypad to move the cursor up, down, left or right.
19000138.10A.QXD SECTION 4 11/11/99 8:47 AM Page 42 GETTING STARTMAPEDPAGE Map Scales Using the GOTO Key Selecting Map Scales The map display has 16 available range scales from 1/8th to 4096 nautical miles (1/4 to 7500 kilometers). The map scale is controlled by the I and H keys, with the current scale displayed at the bottom of the data window. To select a map scale: 1. Press H to zoom out and I to zoom in. The sounder has a built-in worldwide database to 64 (32 in U.S.
19000138.10A.QXD 11/11/99 8:47 AM Page 43 Map Page Options GETTING STARTMAP PAGE Maximize ED Map, The Map Page options menu provides access to many of the features and functions that will help you configure the Map Page to your own preferences. Outlines, and Measure Using the GOTO Bearing and Distance Key To display the Map Page options menu: 1. From the Map Page, press O. SECTION 4 To select a menu option: 1. Highlight the desired option and press T.
19000138.10A.QXD SECTION 4 11/11/99 8:47 AM Page 44 GETTING STARTMAP PAGE ConfigureED Map and Change Using Orientation the GOTO Key Map Page Options (con’t.) • Configure the Map?: Allows you to determine what map items are displayed on a particular map scale which will help prevent excessive clutter. The map configuration page shows a list of twelve map items with corresponding zoom scale selection boxes.
19000138.10A.QXD 11/11/99 8:47 AM Page 45 Map Page Options (con’t.) GETTING STARTMAP PAGE ED Rows Enable/Disable From the map configuration page, you can also access another options menu by highlighting any of the items and pressing O. There are five options: •Enable or Disable a Row?: Allows you to turn an entire row on or off. Using the GOTO and Map Calibration Key To turn an entire row on or off: SECTION 4 1. Use the R keypad to select the desired map item. 2. Press the O key. 3.
19000138.10A.QXD SECTION 4 11/11/99 8:47 AM Page 46 GETTING STARTMAP PAGE ED Restore Map Colors, Defaults, PageGOTO Display Using the Key Map Page Options (con’t.) •Set Map Colors?: The next option available from the map configuration page is the set map colors option, which allows you to define the fill color (grayscale) of the land and water used on the map display.
19000138.10A.QXD 11/11/99 8:47 AM Page 47 Map Page Options (con’t.) MAP PAGE Split Screen Option The last two display options make it possible to display both the Map Page and Sounder Page simultaneously in a split screen arrangement. The top half of the page will show a reduced-size Map Page while the Sounder Page is displayed in the lower half of the screen.
19000138.10A.QXD SECTION 4 11/11/99 8:47 AM Page 48 GETTING STARTMAP PAGE Data Fields, ED Restore Defaults, Setup Using the GOTO Simulator Key Map Page Options (con’t.) •Change Data Fields?: Allows you to specify the type of data that is displayed in each data field on the map display.
19000138.10A.QXD 11/11/99 8:47 AM Page 49 Navigation Page Compass Tape GETTING STARTNAVIGATION ED PAGE Data Fields Overview Using the GOTO Key Graphic Highway Pointer to Waypoint SECTION 5 CDI Scale Whenever a GOTO, MOB, TracBack or route has been turned on, the sounder will provide digital and graphic steering guidance to the destination with the Navigation Page.
19000138.10A.QXD SECTION 5 A 11/11/99 8:47 AM Page 50 NAVIGATION PAGE Overview and Options As you head toward your destination, the highway perspective will move to indicate your progress to the waypoint and which direction you should steer to stay on course. If you are navigating a route, the Navigation Page will show each route waypoint in sequence, with the active leg indicated by the white portion of the highway. Nearby waypoints not in the active route will also be displayed.
19000138.10A.QXD 11/11/99 8:47 AM Page 51 Navigation Page Options (con’t.) GETTING STARTNAVIGATION PAGE ED Configure Data Fields, The following options are available: • Change Data Fields?: Allows you to define the type of data that is displayed in any of the six user-selectable data fields. Thirteen options are available: • BRG • SOG • ETE • XTK • CTS • DIS • COG • ETA • VMG Using theAuto GOTO Highway, COG Key • DPT • STW • TMP • TRN SECTION 5 To change a data field: 1.
19000138.10A.QXD SECTION 6 11/11/99 8:47 AM Page 52 GETTING STARTMAIN MENU ED PAGE Main Menu Page The main menu page provides access to various waypoint, system, navigation and interface management and setup menus. Overview Using the GOTO Key To access the main menu page from any page in the sounder: 1. Press O twice. A B A. The waypoint category options on the main menu page are described in the waypoints section on pages 59-62. B. The routes category options are described on pages 66-69.
19000138.10A.QXD 11/11/99 8:47 AM Page 53 Creating and Using Waypoints GETTING STARTWAYPOINTS ED Creating Waypoints and The sounder stores up to 250 alphanumeric waypoints with user-defined symbols and comments available for each waypoint.
19000138.10A.QXD SECTION 7 A 11/11/99 8:47 AM Page 54 GETTING STARTWAYPOINTS ED Using the MARK Key Mark Key (con’t.) Using the GOTO Key The mark key can also be used on the Map Page to mark the cursor position or an on-screen navaid. To mark a navaid, select it with the cursor. The sounder will use the navaid text shown on the cartography as the default comment. B A. To create a waypoint at an on-screen navaid, move the cursor over the desired navaid. B.
19000138.10A.QXD 11/11/99 8:47 AM Page 55 Creating Waypoints Graphically GETTING STARTWAYPOINTS CreatingED Waypoints Waypoints may also be quickly created from the map display, which allows you to ‘point and shoot’ at any map position and create a new waypoint. Using theand GOTO Graphically by Text Key To create a new waypoint graphically: 1. Use the R keypad to move the cursor to the desired map position.
19000138.10A.QXD SECTION 7 11/11/99 8:47 AM Page 56 GETTING STARTWAYPOINTS ED Reference Waypoints Using the GOTO Key Reference Waypoints A new waypoint can also be created by entering an existing waypoint’s range and bearing or the range and bearing from your present position. The sounder will then calculate the position coordinates for you, using the reference selected. To create a new waypoint using a reference waypoint: 1. Select the ‘Create Waypoint’ option from the main menu page and press T.
19000138.10A.QXD 11/11/99 8:47 AM Page 57 Reviewing and Editing Waypoints GETTING STARTWAYPOINTS EDand Editing Reviewing Once you have created and stored a waypoint, it may be modified, reviewed, renamed or deleted at any time using the waypoint definition page. The waypoint definition page is accessed by highlighting the desired waypoint from the map display or selecting it from waypoint or nearest waypoint list and pressing the T key.
19000138.10A.QXD SECTION 7 11/11/99 8:47 AM Page 58 GETTING STARTWAYPOINTS WaypointED Definition Pagethe Options Using GOTO Key Waypoint Definition Page Options The waypoint definition page also features an options menu that allows you to edit the selected waypoint on the map display, rename the selected waypoint or delete the waypoint from memory. To display the waypoint definition page options menu: 1. Press the O key. To review or edit the selected waypoint from the map display: 1.
19000138.10A.QXD 11/11/99 8:47 AM Page 59 Waypoint Submenus GETTING STARTWAYPOINTS ED and Nearest Waypoints The sounder’s main menu page features four waypoint submenus that let you manage a large number of waypoints quickly and efficiently. The submenus also provide a continuously updated nearest waypoints list and a proximity waypoint alarm function that can be used to define an alarm circle around submerged hazards, shallow waters, etc.
19000138.10A.QXD SECTION 7 11/11/99 8:47 AM Page 60 GETTING STARTWAYPOINTS ED Proximity Waypoints Using the GOTO Key Proximity Waypoints The proximity waypoints list lets you define an alarm circle around a stored waypoint position, and can be used to help you avoid reefs, rocks or restricted waters. Up to nine waypoints may be listed, with a maximum alarm radius of 99.99 nautical or statute miles or kilometers.
19000138.10A.QXD 11/11/99 8:47 AM Page 61 Create Waypoint Submenu GETTING STARTWAYPOINTS ED The third waypoint submenu accessible from the main menu page is the ‘Create Waypoint’ submenu, which allows you to create a new waypoint by manually entering coordinates. Instructions for using the ‘Create Waypoint’ submenu are provided on page 55.
19000138.10A.QXD SECTION 8 11/11/99 8:47 AM Page 62 GETTING STARTGOTO/MOB SelectingED a GOTO Destination Using the GOTO Key Navigation Methods The sounder provides four methods of navigation: GOTO, MOB, TracBack and Route. GOTO The sounder allows you to create a simple route consisting of your current position and selection of a single destination (waypoint) from the waypoint list. Any waypoint on the list can be selected as the destination.
19000138.10A.QXD 11/11/99 8:47 AM Page 63 GOTO Options GETTING STARTGOTO/MOB ED The GOTO options menu provides a list of additional GOTO options that let you start a TracBack route, select a destination waypoint from the nearest waypoints list, select a route to navigate, or cancel the current GOTO destination. GOTO Options Using the GOTO Key To display the GOTO options menu from any page: SECTION 8 1. Press G followed by O To select a menu option: 1. Highlight the desired option and press T.
19000138.10A.QXD SECTION 8 11/11/99 8:47 AM Page 64 GETTING STARTGOTO/MOB MOB andED TracBack Navigation Using the GOTO Key MOB The man overboard feature (MOB) is used in emergency situations, such as man overboard, or to quickly mark a spot. To turn on the MOB feature: 1. Press the B key. 2. Press the T key to confirm and begin navigating to the MOB position.
19000138.10A.QXD 11/11/99 8:47 AM Page 65 TracBack Navigation (con’t.) Once a TracBack has been turned on, the sounder will take the track log currently stored in memory and divide it into segments called ‘legs’. Up to 30 temporary waypoints (e.g. T001) will be created to mark the most significant features of the track log in order to duplicate your exact path as closely as possible.
19000138.10A.QXD 11/11/99 8:47 AM Page 66 Routes SECTION 9 ROUTES Creating a Route Graphically The last way to navigate to a destination is to create a user-defined route. The sounder lets you create and store up to 20 reversible routes (numbered 1-20), with up to 30 waypoints each. Routes can be created and modified right from the Map Page, allowing you to see each route graphically on-screen as you create, review, modify or navigate the route.
19000138.10A.QXD 11/11/99 8:47 AM Page 67 Routes (con’t.) ROUTES Once a route has been created graphically (and the Q key has been pressed to finish), the map display will automatically enter the route review mode. The arrow pointer will be replaced by the map cursor, located at the last route waypoint. The route edit mode allows you to review and modify the route displayed through a pop-up window menu for each waypoint.
19000138.10A.QXD SECTION 9 11/11/99 8:47 AM Page 68 GETTING STARTROUTES ED Route Edit Mode Using the GOTO Key Routes (con’t.) The route edit mode also allows you to insert a new route waypoint in any route leg using the map cursor. To insert a new waypoint between two existing route waypoints: 1. Use the cursor to select the leg you want to insert the new waypoint in (the route line will change to a dotted line when the leg is selected) and press T. 2.
19000138.10A.QXD 11/11/99 8:47 AM Page 69 Routes (con’t.) GETTING STARTROUTES EditingED Routes and To review the selected waypoint: 1. Highlight the ‘Review?’ option and press T. Using Route the EditGOTO Options Key To insert a new waypoint before the selected route waypoint: 1. Highlight the ‘Insert?’ option and press T. SECTION 9 2. Enter the name of the new waypoint using the R keypad, or press O to select the new waypoint from the nearest list, waypoint list, or map display. 3.
19000138.10A.QXD SECTION 9 11/11/99 8:47 AM Page 70 GETTING STARTROUTES ED Route List Page Using the GOTO Key Route List Page The route list page numerically lists all the routes currently stored in memory, with the route number and comment displayed. Route 00 is always reserved for the TracBack route, while routes 1-20 serve as storage routes (route 20 is stored as the GPSMAP tour route, which may be deleted at any time).
19000138.10A.QXD 11/11/99 8:47 AM Page 71 Route List Page Options (cont.) GETTING STARTROUTES ED Route List Options • Clear Route: Allows you to clear all waypoints from the selected route. To clear the selected route: Using the GOTO Key 1. Highlight the ‘Clear Route?’ option and press T. 2. Press T to confirm the clear route warning. • Copy Route?: Allows you to copy the waypoints of a selected route to another route.
19000138.10A.QXD SECTION 9 11/11/99 8:47 AM Page 72 GETTING STARTROUTES ED Page Active Route Active Route Page Using the GOTO Key Each waypoint on the active route page may be reviewed, deleted or changed right from the active route page. To edit an active route waypoint, highlight the desired waypoint and press EDIT/ENTER. Select the desired function from the pop-up menu and press EDIT/ENTER. Whenever you have activated a route, the active route page will appear in the main page sequence.
19000138.10A.QXD 11/11/99 8:47 AM Page 73 Active Route Page Options GETTING STARTROUTES Active ED Route Page UsingOptions the GOTO Key SECTION 9 The following options are available from the active route page: • Invert Route?: Activates the active route in reverse order and begins navigation. • Activate Route?: Reactivates the active route and selects the route leg closest to your current position as the new active leg.
19000138.10A.QXD SECTION 9 11/11/99 8:47 AM Page 74 GETTING STARTROUTES ED Track Log Setup Using the GOTO Key Track Log Submenu The track log submenu lets you specify whether to record a track plot (an electronic recording of your path), and define how it is recorded. It also provides an indicator of the amount of track memory used and selects functions to clear the track memory and start a TracBack route.
19000138.10A.QXD 11/11/99 8:47 AM Page 75 Trip and Fuel Planning GETTING STARTROUTES ED Trip and Fuel Planning The trip and fuel planning submenu lets you plan and review distance, fuel, and ETE/ETA information between any two waypoints, your present position and a stored waypoint, or any part of a stored route. Sunrise and sunset information is also provided. Two planning modes are available: point-to-point and route planning.
19000138.10A.QXD SECTION 9 11/11/99 8:47 AM Page 76 GETTING STARTROUTES ED Route and Trip Planning Using the GOTO Key Trip and Fuel Planning (con’t.) To use the route planning mode: 1. Highlight the ‘Trip & Fuel Planning’ option from the main menu and press T. 2. If the plan field is not set to ‘Route’, press O and select it from the options page. 3. Highlight the route number field and press T. 4. Use the R keypad to select the route you want to plan and press T. 5.
19000138.10A.QXD 11/11/99 8:47 AM Page 77 Trip and Fuel Planning (cont.) GETTING STARTSETUP MENUS ED Planning Sunrise/Sunset To use the sunrise/sunset planner: 1. Highlight ‘Trip & Fuel Planning’ option from the main menu and press T. Using the Setup GOTO System Key 2. Highlight the first waypoint field and press T. Press the left arrow key to clear the field, and use the R keypad to enter the name of the desired waypoint.
19000138.10A.QXD SECTION 10 11/11/99 8:47 AM Page 78 GETTING STARTSETUP MENUS EDand System System Setup Using GOTO Setupthe Options Key Setup Submenus (con’t.) • Time Offset: Provides a data entry field to enter the time difference between UTC time and local time (see page 105 for a list of time offsets). When entering a time offset, be sure to select a positive or negative offset. Entering an offset will not automatically display local time.
19000138.10A.QXD 11/11/99 8:47 AM Page 79 Navigation Setup GETTING STARTSETUPEDMENUS The navigation setup submenu is used to select a variety of navigation information including: position format, units of measure, and heading references. This submenu is also used to select map datums, set the CDI scale and adjust the builtin velocity filter.
19000138.10A.QXD 11/11/99 8:47 AM Page 80 Navigation Setup (con’t.) SECTION 10 A SETUP MENUS Navigation Setup B • CDI Scale: Provides a list of six CDI scale settings for the Map Page CDI: +/-0.10, 0.50, 1.0 (default), 5.0, 10.0 and 25.0 miles or kilometers. The scale represents the distance from the center of the scale to either end of the scale. • CDI Steer To: Allows you select a steer-to-center or steer-to-D-Bar orientation for graphic steering guidance.
19000138.10A.QXD 11/11/99 8:47 AM Page 81 Timers and Alarms Setup GETTING STARTSETUPEDMENUS The timer and alarms submenu is used to control various alarm/timer settings. • Timer: Sounds an alarm when an entered interval (up to 99:59:59) has expired, or provides a continuous running clock timer to 99:59:59. Timers and Alarms Using the GOTO Key To use the countdown timer: SECTION 10 1. Select the Count Down menu option. Enter the desired time interval in the interval field, and press T. 2.
19000138.10A.QXD 11/11/99 8:47 AM Page 82 Input/Output Submenu SECTION 10 SETUP MENUS Input/Output Setup The Input/Output submenu lets you control interface settings for connecting external NMEA devices, a DGPS receiver or a personal computer. The ‘Input/Output Format’ field, at the top of the page, lets you specify one of seven interface formats: •Data Transfer: A proprietary interface that allows you to exchange data such as waypoints, routes and track logs between GPSMAP units or a GARMIN PC kit.
19000138.10A.QXD 11/11/99 8:47 AM Page 83 Using NMEA and DGPS Interface Settings GETTING STARTSETUPEDMENUS NMEA and DGPS Setup If you are using an NMEA interface format, the NMEA format must be specified in the NMEA format field that will automatically appear when an NMEA option is selected. The appropriate baud rate will be set automatically. See page 96 for a list of NMEA supported sentences. Using the GOTO Key SECTION 10 To select a NMEA format: 1.
19000138.10A.QXD 11/11/99 8:47 AM Page 84 Installing and Removing G-Chart Cartridges SECTION 11 G-CHARTS Installing and Removing G-Charts The unit uses G-chart offshore or inland cartography to display digital charts on-screen. G-chart cartridges are installed in the card slot located at the bottom right of the unit. G-chart cartridges may be installed or removed at any time, whether the unit is on or off. To install a G-chart cartridge: 1.
19000138.10A.QXD 11/11/99 8:47 AM Page 85 Using G-Chart Cartography Once a G-chart cartridge has been inserted, the map coverage outlines for the cartridge will automatically appear on-screen. Keep in mind that the display will not automatically scroll to the map area or zoom to a level where you can see the coverage outlines. If you do not immediately see the outlines, scroll the cursor to the broad geographic area covered by the chart and zoom out to another map scale.
19000138.10A.QXD SECTION 12 11/11/99 8:47 AM Page 86 LORAN TDs LORAN C Basics LORAN C Basics LORAN C is a radio navigation aid operated and maintained in the United States by the Untied States Coast Guard. The name LORAN is an acronym for "Long Range Navigation". The LORAN system covers the entire United States and the U.S. Coastal Confluence Zone. From the perspective of a mariner, the system is used for ocean and coastal navigation.
19000138.10A.QXD 11/11/99 8:47 AM Page 87 LORAN TD Feature LORAN TDs SECTION The LORAN TD feature eases the transition from using LORAN to using GPS. The GPSMAP 235 Sounder automatically converts GPS coordinates to LORAN TDs for those who have a collection of LORAN fixes for favorite fishing spots and otherwaypoints recorded as TDs. You can display your position as a TD or enter waypoints as TDs. The accuracy to be expected from this conversion is approximately thirty meters.
19000138.10A.QXD SECTION 12 11/11/99 8:47 AM Page 88 LORAN TDs Using the LORAN TD Position Display Format It is important to set the correct GRI-chain and secondary stations for the waypoint that you want to create. The GRI-chain and Secondary station fields cannot be edited on the Create Waypoint page. The first setting on the LORAN Setup page is the LORAN Chain Number (GRI chain). Accessing this field activates a dropdown menu containing the 28 available chain numbers.
19000138.10A.QXD 11/11/99 8:47 AM Page 89 Creating Waypoints in the LORAN TD Format LORAN TDs SECTION Waypoints can be created graphically, using the Mark Key, and by Text Entry (see page 53). Waypoints can also be created using LORAN TDs. To create a waypoint using the LORAN TD Position Format: 12 Using LORAN TD Waypoints 1. Verify that the correct GRI Chain and secondary stations are selected on the 'LORAN SETUP' page. 2.
19000138.10A.QXD 11/11/99 8:47 AM Page 90 Sounder Installation SECTION A APPENDIX Installation The GPSMAP 235 Sounder must be properly installed according to the following instructions to get the best possible performance. The GPSMAP 235 Sounder is available both with and without a transducer and cable (the cable must be used for FCC compliance). The part numbers are 010-00119-00 (unit without the transducer) and 010-00119-01 (unit with the transducer and cable).
19000138.10A.QXD 11/11/99 8:47 AM Page 91 Mounting the Sounder The unit’s waterproof case is suitable for mounting in exposed locations or at the nav station. The unit comes with a gimbal bracket that can be used for surface or overhead mounting. When choosing a location for the unit, make sure you consider the following conditions: APPENDIX Installation SECTION A • There should be at least a 3” (7.
19000138.10A.QXD 11/11/99 8:47 AM Page 92 To flush mount the sounder: SECTION A APPENDIX Installation 1. Remove the four M5 screws from the back of the unit and remove the mounting bracket. 2. Using the mounting template provided in the box, determine where you wnat to mount the unit and tape the template in place. 3. Using a hammer and center punch, mark the centers of the relief hole and mounting screw holes. 4. Using a drill and a 2.75” hole saw, cut the center relief hole from the panel.
19000138.10A.QXD 11/11/99 8:47 AM Page 93 APPENDIX Installation SECTION A Figure 1-For thick mounting surfaces, insert the M5 screws directly through the four drilled holes. Figure 2-For thin panels, place the mounting bracket on the back side of the panel for additional support.
19000138.10A.QXD 11/11/99 8:47 AM Page 94 Transducer Installation SECTION A APPENDIX Proper transducer placement and installation are key to getting the best performance from your new unit. Detailed installation instructions are provided with the transducer that you have selected. Below are some tips and basic instructions for proper transom mount transducer installation.
19000138.10A.QXD 11/11/99 8:47 AM Page 95 Connecting the Power/Data Cable The power/data cable connects the GPSMAP 235 to a 10-40 volt DC system and provides interface capabilities for connecting external devices, including an external alarm. The color code in the diagram below indicates the appropriate harness connections. APPENDIX Wiring and Specifications SECTION B WARNING! The temperature range for the GPSMAP 235 Sounder is -4º to +158º F (-20º to 70ºC).
19000138.10A.QXD SECTION B 11/11/99 8:47 AM Page 96 APPENDIX Wiring and Specifications NMEA Supported Sentences The following formats are supported for connection to up to 3 NMEA devices: •NMEA 0180/NMEA 0182 •NMEA 0183 version 1.5 Approved sentences--GPBWC, GPGLL, GPRMB, GPRMC, GPXTE, GPVTG, GPWPL, GPBOD, SDDBT, SDMTW and SDVHW Proprietary sentences--PGRMM, PGRMZ (alt.) PSLIB (beacon receiver control input) •NMEA 0183 version 2.
19000138.10A.QXD 11/11/99 PHYSICAL Case: Size: Weight: Temperature Range: 8:47 AM Page 97 Gasketed Construction 7.5”H x 7.7”W 2.6”D (19.2 x 19.74 x 6.7cm) Less than 2 lb. -4º to +158ºF (-20º to 70ºC) APPENDIX Specifications PERFORMANCE (GPSMAP 235 Sounder) Receiver: 12 parallel channel Acquisition Time: Approx. 15 seconds (warm) Approx. 45 seconds (cold) Approx. 5 minutes (AutoLocate ) Approx. 5 minutes (Search the sky) Update Rate: 1/second, continuous Position Accuracy: 1-5 meters (3-16 ft.
19000138.10A.QXD 11/11/99 8:47 AM Page 98 Alarm Clock—The alarm clock has sounded. SECTION C APPENDIX Messages Anchor Drag Alarm—You have drifted out of the specified distance range. Approaching—You are less than one minute away from reaching a destination waypoint at your present speed over ground. Arrival At—You have arrived at the destination waypoint. Can’t Change An Active Waypoint—You have attempted to change the ‘active to’ or ‘active from’ waypoint.
19000138.10A.QXD 11/11/99 8:47 AM Page 99 Proximity Alarm—You have entered the alarm radius for the proximity waypoint indicated. Proximity List Full—You have used all nine proximity waypoints. Proximity Overlaps Another Prox Wypt—The alarm radius specified overlaps the area specified for another proximity waypoint. (See section 10 for more information on proximity overlaps.) RAM has Failed—The random access memory has failed and the unit is not operable.
19000138.10A.QXD SECTION D 11/11/99 8:47 AM Page 100 APPENDIX Map Datums Adindan The GPSMAP 235 Sounder’s built-in worldwide database includes chart coverage down to 64 nm (32 in U.S.) for the areas outlined above. Note that the database is only valid to 68º15’ of latitude. The maximum cursor latitude is 85º05’, and the maximum waypoint latitude is 89º24.543 north or south.
19000138.10A.
19000138.10A.QXD 11/11/99 8:47 AM Page 102 NAD27 Greenland SECTION D APPENDIX Map Datums NAD27 Mexico NAD27 San Salvadr NAD83 Nahrwn Masirah llnd Nahrwn Saudi Arbia Nahrwn United Arab Naparima BWI Obsrvtorio ‘66 Old Egyptian Old Hawaiian Oman Ord Srvy Grt Britn Pico De Las Nieves Potsdam Pitcairn Astro ‘67 Prov So Amricn ‘56 Prov So Chilean ‘63 Puerto Rico Qatar National Qornoq Reunion 102 North American 1927Greenland (Hayes Peninsula) N.
19000138.10A.QXD 11/11/99 8:47 AM Page 103 Almanac Data: The satellite constellation information (including location and health of satellites) that is transmitted to your receiver from every GPS satellite. Almanac data must be acquired before GPS navigation can begin. Bearing (BRG): The compass direction from your position to a destination. Course Over Ground (COG): Direction of movement relative to a ground position.
19000138.10A.QXD 11/11/99 8:47 AM Page 104 Thermocline— A layer of water separating warmer water above from cooler water below. SECTION E APPENDIX Glossary Turn (TRN)— The difference and direction in degrees between the bearing to your destination and your course over ground. The TRN value is used to indicate what direction, and how many degrees, to turn to get back on course. Universal Time Coordinated (UTC)— The time of day at the prime meridian (0º longitude) in Greenwich, England.
19000138.10A.QXD 11/11/99 8:47 AM Page 105 The chart below gives an approximate UTC time offset for the various longitudinal zones. Check with local charts for more detailed information. If you are in daylight savings time, add one hour to the offset. Longitudinal Zone Offset W180.0º to W172.5º W172.5º to W157.5º W157.5º to W142.5º W142.5º to W127.5º W127.5º to W112.5º W112.5º to W097.5º W097.5º to W082.5º W082.5º to W067.5º W067.5º to W052.5º W052.5º to W037.5º W037.5º to W022.5º W022.5º to W007.
19000138.10A.QXD SECTION G 11/11/99 8:47 AM Page 106 2D Navigation . . . . . . . . . . . . . . . . . . . . . . . . .20 3D Navigation . . . . . . . . . . . . . . . . . . . . . . . . .20 APPENDIX Index Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .vi Acquiring Satellites . . . . . . . . . . . . . . . . . . . . .20 Active Route Page . . . . . . . . . . . . . . . . . . .17, 72 Addresses/Phone Numbers . . . . . . .Inside Cover Almanac Data . . . . . . . . . . . . . . . . . . . . . . .
19000138.10A.QXD 11/11/99 8:47 AM Page 107 Map Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .40 Map Orientation . . . . . . . . . . . . . . . . . . . . . . .44 Map Page . . . . . . . . . . . . . . . . . . . . . . . . .10, 39 Center On First Wpt . . . . . . . . . . . . . . . . .69 Center On Vessel . . . . . . . . . . . . . . . . . . . .69 Configuring . . . . . . . . . . . . . . . . . . . . . . . .44 Outlines Off . . . . . . . . . . . . . . . . . . . . . . . .43 Scales . . . . . . . . . . . .
19000138.10A.QXD SECTION G 11/11/99 8:47 AM APPENDIX Index Page 108 Simulated Boat Speed . . . . . . . . . . . . . . . . . . .12 Simulated Boat Steering . . . . . . . . . . . . . . . . .16 Simulating Navigation . . . . . . . . . . . . . . . . . . .20 Simulator Mode . . . . . . . . . . . . . . . . . . . . . . . .4 Sounder, Turning Off . . . . . . . . . . . . . . . . . . .18 Sounder Alarms . . . . . . . . . . . . . . . . . . . . . . .81 Sounder Page . . . . . . . . . . . . . . . . . . . . . . . . . .
19000138.10A.QXD 11/11/99 8:47 AM Page 109 © 1999 GARMIN Corporation www.garmin.com GARMIN International, Inc.,1200 E. 151st Street, Olathe, KS 66062 USA GARMIN (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9AQ UK GARMIN (Asia) Corp., 3F,. No. 1, Lane 45, Pao Hsing Road, Hsin Tien, Taipei, Taiwan R.O.C. Part Number 190-00138-10 Rev.
