JRC JLR-7700MKII - NAVIGATE AUX Screen; Magnetic Compass Correction

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JLR-7700 MK2 GPS Navigator
4.3.3 NAVIGATE AUX Screen
The magnetic compass correction, display unit, and data output format can be set using the NAVIGATE AUX
screen.
Pressing the AUX key on the NAVIGATE screen and inputting the password can set the following items.
4.3.3.1 Magnetic Compass Correction
It is convenient to display the bearing (true bearing) on the GPS navigator in the magnetic compass mode if
the vessel is to be steered with the magnetic compass.
The variation of the magnetic compass can be corrected either automatically or manually. The correction
value needs to be entered if the variation is to be manually corrected. However, no value needs to be entered
if the variation is to be automatically corrected since the equipment automatically corrects the value by itself.
The relationship between the true bearing and magnetic bearing is as follows.
The magnetic correction value represents an approximate value. Thus, it is
necessary to manually enter a proper value by reading the magnetic
variation from the chart if it is necessary to accurately display the bearing
with the magnetic correction.
(1) To automatically correct the magnetic variation
・ Press the key provided on the right hand side of the MAG CORR to highlight the AUTO display.
・ The correction value for the current vessel position will be displayed after a while.
(2) To manually correct the magnetic variation
・ Press the key provided on the right hand side of the MAG CORR to highlight the MAN display.
・ Then, enter the correction value.
Example) Read the magnetic variation from the chart. Operate as follows if the magnetic variation is
found deviated by 6 degrees or more toward west from the true bearing.
Press the 0 , 6 , and ENT keys.
Press the 0 , 6 , E/W , and ENT keys if the vessel has deviated toward east (E).
Bearing
Symbol “m” (magnetic) Type of bearing
When no symbol True bearing
is displayed
When the symbol Magnetic bearing
“m” is displayed
330
°
m
CAUTION