Lowering the transducer
The Operating Panel controls the lowering and hoisting of the transducer. In case of a power failure the transducer can be hoisted or lowered manually by means of a ratchet.
Caution
Do not lower or hoist the transducer manually unless you have first disconnected all power. Disengage the circuit breaker in the Power Supply Unit.
Image
How to manually lower and hoist the transducer depends on:
•  Type of hull unit
•  Hoisting motor with brake / Hoisting motor without brake
To identify a hoisting motor with a motor brake, check for two sets of cables and a large label on the hull unit's top cover.
Illustration: Hoisting motor with brake
A Power cables to the motor
B Power cables to the motor brake
Note
Hoisting motor without brake:
It is crucial that the power to the hull unit is always turned on, even when the sonar is not in use. If the power is turned off, the force of gravity may cause the transducer to be inadvertently lowered. The sonar has a safety function that will automatically hoist the transducer if unexpected problems arise. This function prevents the transducer from being lowered when the sonar is not used, but the power must be turned on.