User's Manual

mn100 Digital Display
12
(17) SHIFT HEAD/ LIFT
Indicates changes in the wind against a compass heading.
Spotting these wind changes is the key to fast sailing
upwind.
To set the mean wind angle:
1. If a Wind Transmitter is included in your Micronet system
then simply press the
button; (the current wind
direction is stored as the mean wind direction and
displayed for 5 seconds during which time the
and
buttons may be used to adjust the value.)
2. If you do not have a Wind Transmitter included, sail close
hauled and press the
button then tack and, once
close hauled, press the button again.
If the mean wind direction changes then the instrument
may be updated by pressing and holding the
button
while sailing on port tack, the
button while sailing on
starboard tack or the
button while head to wind.
See Tacktick’s “Using wind shifts to your advantage” sheet
for further information.
Heading Chapter
(18) MAG HEADING
Current Magnetic Compass heading of the vessel as
measured by the Compass Transducer. The value
displayed will be affected by the calibration routine for the
compass (see page 27).
(19) TACK MAG
Magnetic Compass Heading that the vessel will follow
should it tack through the wind, calculated by the
instrument. Apparent Wind Angle and Magnetic Heading
must be available for this calculation to be made.
(20) SOG
The vessel’s Speed Over the Ground as calculated by the
GPS Antenna or a GPS receiver.
(21) COG
The vessel’s Course Over the Ground as calculated by the
GPS Antenna or a GPS receiver.
Setup and Calibration
25
4.2 Speed Calibration
To ensure that the Boat Speed (and Distance) is accurate it is
necessary to calibrate the speed to take into account
variations in water flow between different hulls. Adjustment is
made by multiplying the Speed through the Water (V) by a
percentage Calibration Factor.
It is essential to carry out this procedure at a time where
little or no tide is flowing.
To enter a Log Calibration Factor
With the vessel under power, steer a straight course allowing the
Boat Speed reading to settle to a constant value. Check the GPS is
showing a constant SOG.
Press and hold the
button for 2 seconds to enter Setup
Press the button repeatedly to scroll to the “SETUP/SPEED”
Chapter
Press the button to advance to “SPEED/+0%” Page
Press the button to enter Edit Mode
Press the
and buttons to change the Calibration Factor
until the Speed reading displayed matches the GPS SOG reading
Press the
button to exit Edit Mode
Press and hold the
button to exit Setup and return to normal
operation.
Should you be unable to carry out this procedure due to strong tidal
conditions or poor GPS information there is further information
regarding Speed Calibration using a measured distance on the
Tacktick website at www.tacktick.com.