Specifications

Operation of IS15 Compass
20220760L 45
4 OPERATION OF IS15 COMPASS INSTRUMENT
4.1 General Description
The display is divided into two sections, the scale with pointer,
and the LCD. Both are controlled by the two buttons.
The Scale
The scale indicates heading in degrees and the four main
bearings N, S, E, W. The pointer always indicates True or
Magnetic Heading.
The LCD Display
In normal operation the LCD has two modes:
• Heading
• Locked Course/Direction to steer
There are two arrows at the top of the LCD indicating what data
is being displayed at any one time. The arrow legend is printed
on the scale. The right arrow points to LOCK for ‘Locked
Course’ mode, the left arrow points to HDG for ‘Heading’ mode.
Scale
Arrow
Left button
Right button
Pointer
LCD display
LCD Arrow
Legend