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 TB 740-97-4
APPENDIX D
DYNAMIC DEHUMIDIFICATION INSTRUCTIONS FOR
LANDING CRAFT, UTILITY, 105 FOOT,
DIESEL POWERED, NAVY DESIGN LCU 1466 CLASS
1.
General. This appendix provides detailed instructions for preparation of the utility landing craft, design LCU 1466
class, for dynamic dehumidification.
2.
Preparation Instructions. a. Disassembly and Stowage.
(1) Pilot house. The following items will be removed, identified, and stowed in the pilot house:
(a) Whistle, bell, and windshield wipers.
(b) Side lights.
(c) Stern light and wake light.
(d) Gyrocompass repeater.
(e) Binnacle stand.
(f) Voice tube.
(g) Deck telephone.
(h) Blinker key control switch.
(2) Crew quarters. The following items will be removed, identified, and stowed in the crew quarters:
(a) Searchlight.
(b) Signal light.
(c) Anchor light and staff.
(d) Canvas covers (all).
(e) Toggle pins and chains for railing and staffs.
(f) Lifelines and stanchions.
(3) Bow storeroom. The following items will be removed, identified, and stowed in the bow storeroom:
(a) Mast stays.
(b) Portable davits.
(c) Hawsers.
(d) Spare anchor cable.
(e) Halyards.
(f) Blocks.
(4) Mast. The mast will be lowered and secured in that position.
(5) Exhaust system. Cleanout covers or plugs will be removed from the manifolds and secured adjacent to
the openings. The flexible connections will be removed from the engine exhaust lines and secured nearby.
b. Preparation for Dynamic Dehumidification.
(1) Dehumidified areas. Two zones of the landing craft will be prepared for dynamic dehumidification. The
zones will consist of the following areas:
(a) Zone No. 1. The ramp winch room and the passage area directly aft, which are located on the
forward port side of the craft, the storeroom and passage area which occupy corresponding positions on the starboard
side, and the storage areas and voids below the well deck forward of the third transverse bulkhead will be included in
zone
1.
(b) Zone No. 2. The pilot house, anchor winch covers, quarters, galley, switchboard room, engine
rooms, generator rooms, boiler room, muffler room, and all other areas to which there is access from one or more of the
above mentioned areas will be included in zone 2.
(2) Provisions for air circulation. Within each zone being dehumidified, all interior doors, hatch and scuttle
covers, manhole covers, and handhole covers will be secured in open position or removed and secured as applicable.
Galley range and refrigerator doors will be secured in open position. Enclosed switchboards, distribution panels, and
other electrical assemblies will be exposed to air circulation by opening doors or loosening covers. All dampers in
ventilation systems will be turned to open position. AU tanks located in areas being dehumidified will be opened to
circulation of air by removal of covers and drain plugs. Drain cocks, where present, will be opened. Covers and plugs
will be tagged and secured adjacent to their places of use. To facilitate circulation of air through the boiler, the door of
the combustion chamber will be secured in open position and the smokepipe disconnected at the boiler. The drain plug
will be removed from the boiler, tagged and secured adjacent to its place of use.
(3) Sealing for dynamic dehumidification. Methods and materials used in sealing for dehumidification will be
in accordance with this
D-1
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