JRC JFS-280 Instruction Manual page 173

Scanning sonar
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6.2.2 RM
You can set your own ship's heading direction (head-up) or north at the top (north-up) of the
sonar image screen.
Operating Procedure
Hup screen is the initial value
The initial value is set to "1. Hup".
Front is own ship
Press the keys "8 → 2 → 2" to go to RM settings
Turn the [MULTI] key to select "2. RM". Press the
[MULTI] knob to select "1. Hup" or "2. Nup" from the
pulldown menu.
"1. Hup" is the own ship heading
"2. Nup" is the north direction.
Turn the [MULTI] knob to move to select "1" or "2".
Press the [MULTI] knob to set it.
6-25
Screen when changed to Nup
Front is north
6 Operation Settings
6

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