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 TB 55-1900-201-45/1
remote control is fitted, the doors should also be operated by the remote control mechanism. The enclosures for all local
control door switches and controllers shall be opened and examined for evidence of water or corrosion.
b. There are three types of watertight doors, they are:
(1) Hinged doors.
(2) Sliding doors, operated by hand gear only.
(3) Sliding doors, operated by power and by hand gear.
c. All subdivision bulkheads shall be examined to determine that their watertight integrity has not been im-
paired. Inspect the bulkhead near the deck for deterioration, and distortion of stiffeners
d. Testing of watertight bulkheads, decks, holds, tanks, chain lockers will be carried out after completing repairs
and/or when there is a question concerning watertight integrity.
(1) Testing of watertight bulkheads, recesses and decks is carried out by a hose test and under simultaneous
inspection of both sides of the plating; with pressure of the water in the hose to be not less than 30 pounds per square
inch.
(2) Shaft tube compartments and forepeaks shall be tested with a head of water equal to the height of the
load draft. The head of water in the forepeak is to be not less than two-thirds of the distance to the bulkhead deck.
(3) Chain lockers should be tested by filling with water.
(4) Deep tanks should be tested with a head of water to the overflow, to the load line, or to two-thirds of the
distance from the top of the tank to the bulkhead or freeboard deck, whichever is greatest.
e. Shaft tube compartments can be tested with air pressure. Test should be conducted with a maximum of
three-fourths pound per square inch.
2-43.Ground Tackle. Inspection of the ground tackle, consisting of all the equipment used in anchoring, including ca-
bles, connecting devices, anchors and windlass, shall be performed annually.
a. All anchor chains up to and including 1 1/2 inches should be ranged on deck and examined throughout their
entire length.
b. If any part of the chain has been reduced by corrosion or wear so that the mean diameter is reduced to 90
percent of its normal diameter, that part should be replaced.
c.
Detachable links should be disassembled and examined for excessive wear or corrosion.
2-25
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