Instruction manual

PROFICIENCY IN SURVIVAL CRAFT AND RESCUE BOATS OTHER THAN
FAST RESCUE BOATS
5 15
5.4 Free-fall
It should be demonstrated that the free-fall release mechanism can operate
effectively when loaded with a force equal to at least 200% of the normal load
caused by the fully equipped lifeboat when loaded with the number of persons for
which is to be approved.
5.5 Float – free arrangements
5.5.1 Float free arrangements
Float free arrangements shall provide for a liferaft to be released
automatically in the event of a vessel's sinking.
5.5.2 Painter system
The liferaft painter system shall provide a connection between the ship and
the liferaft and shall be so arranged as to ensure that the liferaft when released
and in the case of an inflatable liferaft, inflated, it is not dragged under by the
sinking vessel.
5.5.3 Hydrostatic Release Unit
a) Construction
A hydrostatic release unit used in float-free arrangements shall be so
constructed that:
1.The materials used are compatible so as to prevent malfunction
of the unit; galvanizing or other forms of metallic coating on parts of the release
unit will not be accepted;
2.It has drains to prevent the accumulation of water in the
hydrostatic chamber when the unit is in its normal position;
3. Each part connected to the painter system has a strength not
less than that required by the painter;
4. It can readily be removed for replacement or annual servicing.
b) Materials and Components
Materials and components shall be corrosion-resistant and not affected by
seawater, oil or detergents.
c) Performance
A hydrostatic release unit shall: