User's Manual
Table Of Contents
- General Safety Precautions
- List of Contents
- 1 Overview
- 2 Basic Settings; General Remarks about Operating
- 3 PPI Settings
- 3.1 Screen Stabilisation of the PPI: True Motion, Relative Motion
- 3.2 PPI Orientation: Head-Up, North-Up, Course-Up
- 3.3 Centering / Off-Centering of the Display (Center, Off-Center)
- 3.4 Range Selection (Range)
- 3.5 Range Rings, Grid
- 3.6 Own Ship Symbols and Target Symbols, Vectors, Past Position Plots
- 3.7 Trails
- 3.8 Setting the Display of Pre-planned Tracks
- 3.9 Defining the System Track and the Next Waypoint; System Track Display
- 3.10 Setting the Display of User Chart Objects on the RADARPILOT
- 3.11 Setting the Display of Charts and User Chart Objects on the CHARTRADAR
- 3.12 Setting the Display of the Map
- 3.13 Adjusting the Chart or Map to the Radar Video
- 4 Setting the Radar Function
- 4.1 Radar Function On/Off, Interswitch Functions, Master/Slave Switch-Over
- 4.2 Basic Setting of the Radar Video
- 4.3 Selection of the Antenna Revolution Rate
- 4.4 Radar Setting for High Speed of Own Vessel (HSC)
- 4.5 Radar Setting for the Display of RACON Codes
- 4.6 Radar Setting for SART Detection (X-Band only)
- 4.7 Suppression of the Synthetics and Video
- 5 Heading, Speed, Position
- 6 Bearing and Range
- 7 ARPA Functions
- 7.1 Symbols Used
- 7.2 Procedure of the Target Acquisition
- 7.3 Manual Target Acquisition
- 7.4 Automatic Target Acquisition; Settings of the Acquisition/Guard Zone
- 7.5 Deletion of Targets, Loss of Target
- 7.6 Target Data Display
- 7.7 Target Labels
- 7.8 Selecting the Reference Targets for Reference Target Tracking
- 8 EPA Functions (Electronic Plotting Aid)
- 9 Collision Avoidance (TCPA, CPA)
- 10 Trial Manoeuvres
- 11 Editing of Pre-planned Tracks
- 12 Editing the Map
- 13 Displays in the Multidisplay
- 14 Quick Info Box
- 15 Evaluation of the Radar Video
- 16 The Radar Keyboard
- 17 Alarm Management
- 18 List of Alarms
- 19 List of the Alarm Signal Outputs
- 20 Care and Maintenance Work
- 21 Performance Monitor
- 22 System Maintenance Manager
- 22.1 Determining the Versions of Software, Hardware and Documentation
- 22.2 Listing the System Faults
- 22.3 Off-Line Selfcheck
- 22.4 Checking / Correcting the Computer Time
- 22.5 Distribution and Deletion of Map Data; Data Saving
- 22.6 Exchanging Track Files between the Indicators; Data Saving
- 22.7 The Handling of Diskettes
- 22.8 Aborting and Restarting the Program of the Radar System
ED 3038 G 232 / 01 (2002-06)
Operating Instructions
15 Evaluation of the Radar Video
15.1 Achievable Radar Range
b_r1_e33.fm / 21.06.02
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RADARPILOT / CHARTRADAR
15 Evaluation of the Radar Video
Subjects of this Section:
◆ Achievable radar range
◆ Radial and azimuthal distortions of the radar video
◆ Influences of fog, rain, snow, hail
◆ Reflections from the sea surface
◆ Disturbances caused by other radars
◆ False or indirect echo displays
◆ Sectors of reduced radar visibility
◆ Superrefraction - subrefraction
◆ Sector Blanking
15.1 Achievable Radar Range
The theoretically achievable radar range limited by the curvature of the earth depends on the height
of the antenna above the water surface and the height of the target, and is applicable under normal
atmospheric conditions - see the following table.
Whether radar targets can be detected up to this theoretical range, even with optimum video setting,
depends not only on the atmospheric conditions but also on the characteristics of the target:
- Large targets with good reflection characteristics produce strong echo signals and are displayed with
corresponding clarity on the screen.
- Smaller targets situated in the shadow of large objects are not illuminated by the radar pulses and
are therefore not displayed.
- Flat coasts have an unfavourable reflection cross-section and cannot be recognized until they have
been approached more closely. On the other hand, high coastlines and mountainous regions further
inland are recognised at a very early stage.
- In the coastal approaches, the tide rip lines and surf areas are displayed similarly to coastlines.
However, this rather irritating display can be a valuable orientation aid for the coastal navigator.
Antenna Height
Above Water Surface
Theoretically Achievable Radar Range
at a Target Height of
1 m 3 m 10 m 30 m 100 m 300 m 1000 m
8 m 9 NM 12 NM 13 NM 18 NM 28 NM 44 NM 76 NM
15 m 11 NM 13 NM 16 NM 21 NM 31 NM 47 NM 79 NM
30 m 12 NM 16 NM 19 NM 13 NM 34 NM 50 NM 82 NM