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• Resistance to ship's speed
Do not exceed the speeds shown in the table below while using the hoisting device.
If you use the hoist while the ship is travelling faster than these speeds, the hoist may break and
cause an accident.
Hoisting
'Rising' 16 knots or lower
operation
'Lowering' 16 knots or lower
• Replace the zinc plate, which is for preventing electrolytic corrosion, every year.
Always take measures to prevent electrolytic corrosion. If you do not prevent electrolytic corrosion,
there may be severe consequences, such as the transducer may fall out or sea water may get into
the dome.
To prevent accidents at sea
If the transducer or hoisting device is damaged in a maritime accident, the sonar may become
inoperable, which may pose a problem for work and safety aboard ship.
Also, repairs and replacement of the transducer or hoisting device is very expensive and time
consuming.
To prevent this kind of accident from happening, do the following operations, in the situations
described below, to store the transducer.
1.
Conditions
(1) When there are many things floating or drifting in the sea
(2) When a group of ships is gathering nets and the light ship comes out of the gathered nets
(3) In shallow waters, where there may be ropes or wires strung across the sea
(4) While the ship is anchored
2.
Transducer storage operations
(1) Press the [SHED] key on the keyboard to store the transducer.
(2) When the transducer is rising, the hoisting mark on the top right of the screen turns red and
the outline flashes.
(3) The transducer is stored, and when it reaches the upper limit, a storage finished message
appears in the middle of the screen and the hoisting mark becomes green.
Hoisting device safety
Maximum resistance to ship's speed
viii
18 knots
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