1. True North Capability
You may enter the magnetic variation of your boat's location into the Sailcomp 103AC's
memory so that it displays True North rather than Magnetic North. As you know,
when you go from Magnetic North to True North, you add Easterly deviations and
subtract Westerly deviations. (From True to Magnetic - do the opposite). Therefore, if
you have a magnetic variation of 14°W, you will subtract 14° from all headings to dis-
play True North. Magnetic variation is entered into the system by using the "A" Offset
capability accessed through the "Compensation Display".
Entering Magnetic Variation
To enter magnetic variation into the Sailcomp 103AC's memory, enter into the
"Compensation Display" by
simultaneously
pushing the
timer
and
crs
(course)
buttons
until you see "
CAL
" appear on the display. Then apply a short push to the
crs button
.
The display will show "
AoF
", indicating that you have entered into the "Alignment
Offset" ("A" Offset) section of the software.
1. To examine the value for the "A" Offset, apply a short push to the
nav button
. The
display will flash the current value of the offset. Offset is set at the factory to 00°.
Important Note:
If you added or subtracted "A" Offset error during your initial
compensation, then you will need to add the magnetic variation to the "A" Offset
value and enter the sum. For instance, if you entered -2° for "A" Offset and at your
location there is a magnetic variation of 14°W then the equation is:
(-2°) + (-14°) =
(-16°)
You will enter -16° into the Memory.
2. To enter positive (+) values for magnetic variation, hold down the
nav button
until
the desired (+) value is shown on the display.
3. To enter negative (-) values for magnetic variation, hold down the
port button
until
the desired (-) value is shown on the display.
4. To change the offset, use the
nav
and
port buttons
to scroll up or down the correct
number of degrees.
5. To save the variation value and return to compass mode, apply a short push to the
crs
button. The new value will be stored and the display will return to compass
mode. You will notice that the Sailcomp's headings will now read True North.
Make sure you record this information at the back of this manual
(pg. 46)
for future
reference.
36
V. SPECIAL FUNCTIONS
