Instruction manual

PROFICIENCY IN SURVIVAL CRAFT AND RESCUE BOATS OTHER THAN
FAST RESCUE BOATS
5 6
recovering the hook after a liferaft has been launched, without turning the davit
inboard.
They shall also be fitted with a safety hook, which when the safety catch is
released, will automatically release the liferaft as soon as it is waterborne. In lieu
of a winch, some single arm davits intended for launching liferafts will be fitted
with a spring motor for automatic recovery of the fall.
Fig. 5.3 Single arm davits
5.1.5 Tricing pendants
Tricing pendant are attached to the floating blocks of the falls on gravity
davits and to the shoulders of the davits themselves. Having been made a pre-
determined length, they will bring the boat alongside when it is lowered to the
embarkation deck.
Made of wire, they incorporate a strong rope lashing between the end of
the wire pendant and a senhouse slip, to allow it to be cut in an emergency.
The shackle attaching the senhouse slip to the floating block is required
to be elongated, so that it is impossible for the tongue of the senhouse slip or the
link holding the tongue, to be jammed against the floating block.
The link of the senhouse slip is secured in position by a wood safety pin,
should this pin become wet and swell it is easily broken. Steel pins are not to be
used for this purpose because they are liable to rust in place.
Care must be taken when lowering the boat, not to let it over-run and so
place an undue load on the tricing pendants. Bowsing-in tackles are to be made
fast to the floating blocks and the ship’s side, hauled tight and made fast and the
tricing pendants released before persons are allowed to embark. A true
senhouse slip is embodied in the tricing pendants to facilitate the operation of
letting them go while there may be a certain amount of weight of them.