Furuno CH-37 - Manual (Page 13)

1-3
1.2 Turning the Power On/Off
Power on
Press the PWR switch on the main panel. The lamp above the
switch lights to show that power is turned on.
Power off
Retract the transducer with the g key on the main panel. The
lamp above the switch lights while the transducer is being raised
and goes off when the transducer is fully raised. Then, press
the PWR switch.
Note: The transducer is automatically retracted into the tank
even if the PWR switch is pressed before retracting the
transducer. However, for safety purposes, make it a habit
to retract the transducer before turning off the power.
1.3 Adjusting Screen Brilliance, Panel Backlighting
The BRILL control adjusts screen brilliance and the DIMMER
controls adjusts panel backlighting. These controls are on the
sub panel 1.
1.4 Lowering the Transducer
Press the h switch on the main panel to lower the transducer.
The lamp above the switch blinks while the transducer is being
lowered and lights when the transducer is fully lowered.
CAUTION
Observe maximum allowable ship’s speed
of 18 knots during operation and 15 knots
while raising/lowering transducer, to prevent
damage to the transducer.