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 TB 740-97-4
and the deck Will be sealed in a similar manner.
(d) Capstan. The opening between the capstan head and the capstan pedestal and the joint at the pedestal
and the deck will be sealed with strippable coating and bituminous coating.
(c) Tank vents, fills and discharges. All tank vents and all fill and discharge openings located on deck will be
sealed with strippable coating and bituminous coating.
(f) Fire monitors. The openings resulting from removal of the three fire monitors and valves will be blanked
and sealed with strippable coating and bituminous coating. The blank on the portside boat deck will be provided with a
hole of sufficient size to introduce the moist air return duct.
(g) Stack. The louvered section and the openings at the top of the stack will be masked with pressure-
sensitive tape and sealed with strippable coating and bituminous coating. The joint between the stack cover and the rim of
the stack will be sealed with strippable coating. The exhaust stacks protruding from the stack cover will be blanked and
sealed with strippable coating and bituminous coating. The door in the stack will be sealed with strippable coating and
bituminous coating. All other seams or openings in the stack which might affect the air tightness will be sealed in a similar
manner.
(h) Gooseneck and mushroom vents. Goosenecks and mushroom vents will be sealed with strippable coating
and bituminous coating.
(i) Voice tubes. The mouthpiece covers on the voice tubes, located on the emergency steering station, will be
sealed with strippable coating and bituminous coating.
(j) Skylight. The opening resulting from removal of the aft skylight glass on the portside will be blanked with a
galvanized sheet metal or exterior grade plywood blank provided with a hole of sufficient size to introduce the
dehumidification system dry air duct. The blank and the remaining skylight glasses and frames will be sealed at the edges
with strippable coating and bituminous coating. The skylight will be closed and the joint between the skylight base and the
movable sections will be sealed with strippable coating and bituminous coating. The Joint at the skylight base and the
boat deck will be similarly sealed.
(k) Fidley. The stagger welds and gasketed Joint around the fidley will be sealed with strippable coating and
bituminous coating.
(l) Exterior doors, windows, and portlights. The edges of the exterior doors, pilothouse windows, and
portlights, except those used to introduce dehumidification ductwork, humidistat cable or sensing element contacts, will be
sealed with strippable coating and bituminous coating. When sealing the portlights, the strippable coating will be extended
outward over the adjacent surfaces of the bulkheads.
(m) Louvered openings. The louvered opening in the door to the fanroom aft of the pilothouse will be covered
with a galvanized sheet metal or plywood blank. The blank will be secured over the louvers. The perimeters of the blank
and of the door will be sealed with strippable coating and bituminous coating. The louvered opening to the fanroom at
frame No. 37 will be covered with the installed cover and the perimeter of the cover sealed with strippable coating and
bituminous coating.
(n) Steering cable guide tube. The steering cable guide tube will be sealed at the stern end of the tube with
strippable coating and bituminous coating. The seal will extend around the cable and the tube opening and will overlap
both for a distance of 2 inches.
(o) Stern tube cooling water connection. The cooling water pipe will be detached at the stern tube connection
and the opening to the stern tube closed with a plug or a cap. The threads will be coated with pipe thread compound.
(p) Fire stations. The openings resulting from removal of the port and starboard fire station valves and fittings
above the first flange on the main deck will be blanked with galvanized sheet metal or exterior grade plywood blanks. The
blank on the portside line will be provided with a hole for the passage of the humidistat cable. The blank on the starboard
line will be provided with a hole for mounting the sensing element contact.
(q) Fire and salvage line blanks. The fire and salvage line blanks will be sealed with strippable coating and
bituminous coating.
(r) Engine order telegraph. The engine order telegraph on the lifeboat deck will be sealed with strippable
coating and bituminous coating. The junction of the pedestal and the deck will be similarly sealed.
(s) Windlass cover. A cover will be fabricated and installed over the anchor windlass, the blanked hawse pipe
openings, and the forepeak access. The cover will be fabricated from minimum No. 18 gage galvanized sheet metal. All
top and vertical edges will be reinforced by 1 x 1 x 1/8-inch angle irons. A coaming of I x 1/8-inch angle iron will be tack
welded to the deck around the windlass. The angle irons will be positioned with one face against the deck and the vertical
face toward the windlass. The size and shape of the coaming will be
Change 2 G-2
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