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4 Improvement of user-friendliness of a manual
4.1 Use of figures/photos
Figures, preferably coloured ones, or photos should be used as far as practicable to make manuals easy to understand.
4.2 Use of standard wording
The following standard wordings should be used for explaining about release gear systems:
.1 Release handle
.2 Hook (fore and aft hooks)
.3 Safety pin
.4 Hydrostatic interlock
.5 Interlock lever
.6 Control cable
.7 Link stopper
.8 Lock piece
.9 Reset lever
.10 Davit operating grip
.11 Frame
.12 Davit arm
.13 Davit arm stopper
.14 Remote control wire
.15 Suspension block
.16 Suspension link
.17 Over lashing wire rope
.18 Auto trigger wire rope
.19 Winch handle
5 Example of operation and maintenance manual of a lifeboat system
An example of operation and maintenance manual of a fire-protected lifeboat system is attached in the following pages just for reference. It should be noted that lifeboat systems are different from each other and some specifications, e.g., over lashing wire ropes, in the example manual are not applicable to the lifeboat systems of the other types. The example attached hereafter is not the model manual and it is not recommended to use the example as the basis for developing manuals for lifeboat systems.
An example of operation and maintenance manual for a lifeboat system
Table of contents
1 General
2 Launching operation
2.1 Preparation before launching (in case of drill)
2.2 Release of over lashing
2.3 Setting of painter
2.4 Release of safety pin for boat winch brake
2.5 Release of davit arm stopper
2.6 Boarding to the lifeboat
2.7 Launching procedure
2.8 Releasing operation
2.9 Painter release and lifeboat operation
3 Recovery operation
3.1 Resetting procedure of release hook
3.2 Recovery procedure
3.3 Stowing procedure of lifeboat
4 On-load/off-load release gear system
4.1 General
4.2 Hook unit
4.3 Release handle unit
4.4 Hydrostatic unit
5 Inspection and maintenance
5.1 General precautions
5.2 Inspection and maintenance of lifeboat
5.3 Inspection and maintenance of davit and winch
1 General
The lifeboat is stored on the boat davit and equipped with both side of the ship. In case of emergency, the crew can board the lifeboat and escape with the lifeboat directly from its stowage position.
The launching appliance is consisted of a boat davit (davit arm, frame, stage, suspension block, and lashing device) and a boat winch (reduction gears, hand brake and governor brake).
Swing out and lowering operation of the lifeboat can be controlled both from the inside of the lifeboat and at the ship's deck. The lowering speed of the lifeboat can be controlled by operating the remote control wire inside the lifeboat or by operating the remote control lever on the ship's deck. Moreover, it is possible to suspend the lowering operation of the lifeboat at any height.
Recovery of the lifeboat is performed by operating the boat winch with the push-button switch box. When the davit arm reaches a prescribed position, the boat winch is automatically stopped by the limit switch. After the activation of limit switch, the boat winch is operated manually to wind up the lifeboat to its stowage position. The boat winch is provided with a safety device to prevent the reverse operation of the manual handle.
The lifeboat is equipped with on-load/off-load release gear which complied with the requirements of Chapter III of 1996 Amendments to 1974 SOLAS Convention, the LSA code and the resolution MSC.81(70). The release gear system is equipped with the interlock system consisting of the hydrostatic unit so as not to release the hooks where the boat is in air (not waterborne).
Read this manual carefully before using boat davit, boat winch and the on-load/off-load release gear system.
Fig. 1.1 Lifeboat davit arrangement
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