LINE-THROWING    APPARATUS	253
DISTRESS SIGNALS.
Two of the statutory signals, viz., "a continuous sounding witk
any fog signal apparatus," and "flames from the ship/3 are liable to be
contused with a vessel making similar signals merely to attract attention
only, or, providing working flares on fishing boats.
It is recommended that Morse signals of distress made on a fog
horn or with a lamp should be a continuous repetition of S 0 S (Morse)
and the same for a visual distress signal on a lamp.
Instead of flames from the vessel it is recommended that red flares
should be used and, particularly, a firework signal showing a brilliant
red flare and throwing five or more red stars to a height of 80 feet.
LIFE-SAVING APPLIANCES RULES—LINE-THROWING
APPLIANCES ON SHIPS,
Every ship of 500 tons gross and upwards, when proceeding on a
voyage or excursion from a port in the United Kingdom, must carry •
line-throwing appliances which shall be at least as effective as the
following apparatus, viz..—
Four 2-lb. line throwing rockets with suitable sticks capable of
throwing a line 5/16ths inch in circumference a distance of 120 yards
in calm weather. Two such lines, each not less than 240 yards in
length, having a breaking strain of not less than 150 Ibs.
Rockets—Should be specially made for line throwing (i.e., without
stats or detonating composition) by approved manufacturers. They
should have a watertight outer case and should be marked with the
date of manufacture. The means of ignition should be either by
(i) slow-burning fuse at the base ignited by portfire or by (ii) a frictional
striker applied to slow burning composition at the base or side of
rocket. In either case the arrangement should allow for a delay of
not less than three seconds before the rocket commences its flight.
In the case of a frictional ignition, its striker should be carried, ready
for use, in a small sheath on the rocket. Rockets should be replaced
at least every five years.
Sticks.—To be not less than 5 feet in length and to be attached
to the rocket when required for use by a spring clip engaging in a slot.
Container.—Rockets, lines and portfires (if used), with a copy of
directions for use of the appliance, should be stowed together in a
watertight case, i.e., in a case which is sufficiently weathertight and
watertight to keep the rockets available for use at any time.