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 TB 55-1900-231-15
APPENDIX B
DYNAMIC DEHUMIDIFICATION INSTRUCTIONS
FOR
LANDING CRAFT, UTILITY, 115 FOOT
DESIGN LCU-1466A (MODERNIZED)
NSN 1905-01-31/7
I. GENERAL: These instructions provide details required for preparation and installation of dynamic
dehumidification on the utility landing craft. Materials and manhours required to perform the functions herein are
specified in the attached listing. The watercraft has approximately 16,000 feet of area to be dehumidified.
II. PREPARATION:
A. Herculite covers secured with nylon drawstrings shall be installed over the following items: (See Chapter
1. Pilothouse shelter searchlight.
2. Poop deck signaling searchlight.
3. Poop deck freezer.
4. Stern anchor winch and engine, including one for the swivel.
5. Muffler room exhaust fan mushroom.
6. Galley exhaust fan mushroom.
7. Engineroom natural supply mushroom.
8. Galley supply fan mushroom.
9. Pyrotechnic lockers.
10. Chemical warfare locker.
11. Life preserver locker.
12. Flag locker.
13. Poop deck hawser reel.
14. Port forecastle spare anchor cable reel.
15. Stbd. forecastle hawser reel.
16. Intercom stations and loud speakers. (Exposed to weather only.)
17. P-250 portable bilge pump.
18. AN/URC-92 radio antenna coupler.
19. Shore power receptacle.
B. The heating boiler exhaust stack shall be unfastened at the hinged flange and stowed in a horizontal
position on its stowage stanchion. Fabricate and install a notched wooden blank to fit over the exposed
exhaust hole and secure with the existing eyebolts, washers and nuts. Unfasten the stern light electrical
cable support clips or unplug as required to prevent stress on the cable when the stack is stowed. Install
cap on receptacle if unplugged.
C. Using pressure sensitive tape, glue and strip coat, seal the following exterior vents:
1.
Dryer air exhaust (under stern anchor winch swivel foundation).
2.
Galley sink gravity drain (to port of deck freezer).
3.
Heating boiler air intake (aft. of stern anchor winch).
4.
5.
CHT room natural (outboard of bulwark). Do not confuse with the holding tank vent. This natural
vent may not be installed on all vessels.
6. All other vents are to remain unsealed.
B-1
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