570 NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
SPECIAL SURVEY No. 2.
Survey No. 2 is the same as for Survey No. 1 and in addition—
The plating in way of the side-lights is to be examined, and if
the Surveyor deems it necessary he may require holes to be drilled
in any portion of the structure where signs of wastage are evident.
The chain cables are to be ranged for inspection, and the anchors
and chains are to be examined and placed in good working order.
If any length of cable is found to be reduced in mean diameter at
its most worn part it is to be renewed. The chain locker is to be
examined internally.
SPECIAL SURVEY No. 3.
All the requirements of Survey No. 1 and No. 2 have to be
complied with, and in addition all rust is to be removed from iron
and steel work throughout the ship, and the Surveyor is to satisfy
himself as to the condition of the plating which may, if considered
necessary, be drilled to test for thickness at places indicated by him,
afterwards all scaled and chipped parts to be coated.
All iron, steel and wooden masts, derricks, etc., are to be tested
by hammering, and, if considered necessary, drilled to test for
thickness of plating, etc. Mast wedges to be removed and replaced.
Where holds are insulated, inspection holes in the insulation
to be cut and frames and plating in the way of same to be examined,
The Machinery Survey is carried out periodically at the same
time as the hull survey. Boilers, however, when they are six years
old come under an annual survey. * *
The Steam Steering Engine and its connections, the steering
rods, chains, blocks, rudder, quadrant, tillers, steering gear, windlass
pumps, sluice valves, watertight doors, air and sounding pipes are
to be carefully examined, and the condition of same is to be stated
on the Surveyor's report. The Surveyor must see that the doubling
plates are fitted under all sounding pipes.
Double Bottom Ta/iks.—The ceiling of double bottom is
removed and the efficiency of the tanks tested by a head of water
to the height of the load waterline. Peak tanks a,nd deep ballast
tanks are tested by a head of water not less than 8 feet (or 30 per