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 TB 740-97-4
General Notes Applicable to Figure 69.
GENERAL NOTE
Variations in the arrangement of the fire main system for the various vessels can be disregarded as long as the desired dry-air
distribution can be effected and all branches not used for dry-air distribution are shut off.
GENERAL INACTIVATION NOTES
1.
Prior to installation of equipment and arrangement of services, as indicated on this plan, the vessel shall be prepared in
accordance with TB 740-97-4, air and water tightness.
2. All dampers, doors, hatches, valves, and other closures not shown, shall be closed. Those shown shall be closed unless
otherwise indicated. Valves shown, but not used for control of dry-ar flow, shall be left eased off from wide open position.
3. Valves in the fire main and connected services used for control of dry-air flow shall be tagged "keep closed", "keep open" or "use
for control", as required.
4. Where existing vessels structure or services deviate from this drawing, air flow shall be modified to suit the intent of this plan.
5. All valves, fittings, etc , to be removed shall be tagged for proper replacement.
6. All gaskets required for reassembly of valves, fittings, etc. shall be supplied and attached to item removed.
7. Where it is necessary to cut openings in structures such as holes in bulkheads or decks for passage of dehumidification air,
provision shall be made for readily closing such openings upon return of vessel to active status, i.e., plating of suitable dimensions,
with arrangements for ready installation, properly identified, and secured nearby for rapid replacement.
8. Each dry-air outlet shall be controlled by nearest valve, as indicated, to obtain proper volume of dry air.
9. Dehumidification machine and humidistat will be obtained through regular requisitioning supply system.
10. Flexible hose shown shall conform to MIL-H-8796, 4 " O D standard catalog. Unless otherwise indicated, connections shall be
by "bag" fittings or other suitable connections.
11. Preservation of oil and gasoline tanks shall be in accordance with TB 740-97-4.
12. Shore Service Requirements:
Electrical
MAX Rate
Dehumidification Machine
440V. AC
3 KW
Lights and Testing
120V. AC
19 KW
Vessels service power and lighting switchboard shall be energized through shore connections box. AD circuit breakers on the
switchboard shall be opened except those feeding power and lighting service.
13. Dehumidifier, size 20-153, and humidistat(s) will be used for this plan.
14. Dehumidified volume of vessel-66,000 cu. ft.
15. Plan applicable to Tug-ATA/377.
U-9
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