BOAT EQUIPMENT 1C
safely lowered into the water with the full complement of persor
and equipment on board.
Buoyancy apparatus shall be constructed of copper or yellow meta
of not less than IS ounces to the superficial foot. The tanks are coate(
with boiled linseed oil or varnish to preserve them. Boats to hav<
a capacity of not less than 125 cubic feet.
18. What type of boats are specified as Class 1?
There are three different types named A, B, and C.
Type A.—Open life-boats with internal buoyancy only. The buoy-
ancy of a wooden boat of this type shall be provided by watertight
air-cases, the total volume of which shall be at least equal to one-tenth
of the cubic capacity of the boat.
Type B.—Open life-boats with internal and external buoyancy.
The internal buoyancy of a wooden boat of this type shall be provided
by watertight air-cases, the total volume of which shall be at least
equal to 7£ per cent of the cubic capacity of the boat.
If the external buoyancy is of cork, its volume for a wooden boat
shall be not less than thirty-three thousandths of the cubic capacity
of the boat; if of any material other than cork its volume and distribution
shall be such that the buoyancy and stability of the boat are not less than
that of a similar boat provided with external buoyancy of cork.
In the case of a metal boat of both A and B types, an addition
shall be made to the cubic capacity of the airtight compartments so as
to give it buoyancy equal to that of the wooden boat.
Type C.—Pontoon life-boats having a well deck and fixed watertight
bulwarks. The area of the well deck of a boat of this type shall be at
least 30 per cent, of the total deck area. The freeboard shall be such
as to provide for a reserve buoyancy of at least 35 per cent.
19. What type of boats are specified as Class 2?
There are three different types named A, B, and C.
Type A.—Open life-boats having the upper part of the sides collapsible.
A boat of this type shall be fitted both with watertight air-cases and
with external buoyancy, the volume of which for each person which
the boat is able to accommodate shall be at least equal to the following
amounts:—
Air-cases - - - - 1*5 cubic feet.
External buoyaney (if of cork) 0*2 cubic feet.