关于巴黎备忘录和东京备忘录联合开展船舶救生艇降落设备

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Install and tighten the auto release gripe, if fitted.

Tighten the auto release gripe rope with the turnbuckle. 8

Connect the painter to the painter release hook on the bow of lifeboat. MSC.1/Circ.1205 ANNEX Page 31

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5 On-load/off-load release gear system 5.1 General

This section describes the details of the release gear system. Read this section carefully for safe

operation. This release gear system consists of fore and aft hooks, a release handle near the steering

console, a hydrostatic unit and the associated cables (see Fig. 5.1).

The releasing operation of the hooks is conducted at the release handle near the steering console

through the control cables terminating at the fore and aft hooks. The interlock system including the

hydrostatic interlock unit is provided to prevent the release of the hooks when the boat is not

waterborne.

The system also has an on-load release function which makes it possible to over-ride the interlock by

the hydrostatic unit. Incorrect on-load release operation may cause fatalities and due precautions

should be taken for this operation.

Fig. 5.1 Schematic of release gear system Fore hook unit Aft hook unit

Hydrostatic interlock unit Control cables Interlock cable MSC.1/Circ.1205 ANNEX Page 32

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5.2 Fore and aft hook units 5.2.1 Structure and parts names

The structure and parts names of the fore and aft hooks are shown in Figures 5.2.1.1 and 5.2.1.2.

The fore and aft hooks are generally identical except for the direction of installation. Fig. 5.2.1.1 Perspective of the hook unit Fig. 5.2.1.2 Internal view of the hook unit Hook

Safety latch Reset lever

Maintenance pendant attachment Cam lever box Cam lever pin Hook retainer (Lock piece) Cam lever

Control cables (to release handle) Reset lever stop

MSC.1/Circ.1205 ANNEX Page 33

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5.2.2 Releasing

When the release handle near the steering console is pulled, the cam lever pin is turned by the

control cable and the lock piece is then made free. Finally the hook is turned and released

(see figure 5.2.2).

Fig. 5.2.2 Release principle of the hook unit Hook

Hook retainer (Lock piece)

Cam lever pin Control cable (to release handle) Cam lever

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5.2.3 Resetting

After the resetting of hooks, the posture of each hook is held by the lock piece and the lock piece is

locked by the cam lever pin with the reset lever. To ensure the proper resetting of the fore and aft

hooks, the procedures described in paragraph 4.1 should be followed. The fore and aft reset levers

must be operated simultaneously. After simultaneous resetting of the hooks, the release handle near

the steering console also returns to the closed position (see figure 5.2.3). Fig. 5.2.3 Reset principle of the hook unit

Hook unit

Hook Re-set lever

Hook retainer (Lock piece) Control cable

(to release handle unit)

Release handle unit

Cam lever

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5.3 Release handle unit

5.3.1 Structure and parts names

The structure and parts names of the release handle are shown in figures 5.3.1.1 and 5.3.1.2.

Fig.5.3.1.1 Perspective of the release handle unit Fig.5.3.1.2 Internal view of the release handle unit 5.3.2 Operation

When the lifeboat is fully waterborne, the lifeboat can be released by removing the safety pin and

then pulling the release handle fully and quickly to the open position (off-load release). The lifeboat

can also be released by the same operation of the release handle even though the lifeboat is not fully

waterborne, by opening the interlock cover and lifting up the interlock lever. This over-rides the

interlock function of the hydrostatic interlock unit (on-load release). Fig. 5.3.2 Operation procedure of the release handle Safety pin Release handle

Control cables (to the hook units of fore and aft) Interlock cable (hydrostatic) Interlock cover

Release handle

(Closed position) (Open position)

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5.4 Hydrostatic interlock unit 5.4.1 Structure and parts name

Structure and parts names of the hydrostatic interlock unit are shown in figures 5.4.1.1 and 5.4.1.2.

Fig. 5.4.1.1 Perspective of the hydrostatic interlock unit Fig. 5.4.1.2 Internal view of the hydrostatic interlock unit 5.4.2 Operation

When the lifeboat is fully waterborne, the hydrostatic interlock unit pushes up the interlock lever

through the interlock cable by the water lifting the float and thus allowing the release handle to be

operated. Contrary to this, operation of the release handle is not allowed by the hydrostatic interlock

unit when the lifeboat is not fully waterborne. Interlock cable ( to the hydrostatic interlock lever of the