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 TB 740-97-4
CHAPTER 3
STORAGE INSTRUCTIONS
Section I. DRY STORAGE
15. General. Dry storage is the preferred method for storing floating equipment.
16. Storage Location. Selection of the storage site will give due consideration to the following requirements:
b. Accessibility to transportation.
c. Adequate security.
d. Availability of sufficient electrical power.
17. Storage Plan. The storage plan will provide for grouping vessels by type and size in formation that will provide adequate space
for placement, selection and servicing of the vessel.
18. Blocking and Cradling. The design and application of supporting structures for dry stored vessels will observe the following
principles and guide lines:
a. Docking plans, line drawings, profiles, and sections of vessels will be used as guides.
b. Many well distributed supports will be used to avoid concentrated loads.
c. Hulls will be sufficiently elevated to provide good air circulation and ease of in-storage maintenance.
e. Blocking will include cradles, keel blocks, bilge blocks and shoring, as applicable.
19. Storage Aboard Other Vessels. Small steel hull vessels may be stored on decks of larger, wet stored, steel hull vessels when
reasonably accessible dry storage space ashore is not available.
20. Shelters for Wood and Plastic Vessels. The general characteristics of shelters for wood and plastic hulls will provide for the
following: a. Protection from rainfall and lengthy exposure to direct sunlight.
b. Maximum air circulation.
c. Shelter supports independent of the vessel.
21. Ventilation. Ventilation for vessels, not under dehumidification, will be that required to prevent condensation within the vessel.
Hatches, accesses and other openings used to provide ventilation will be shielded with suitable covers or ventilators to prevent the
entry of water. When wood ventilator covers and/or shelters specified herein are used for venting voids and protection of deck
machinery, they will be the demountable type and will include the fabrication features as shown in figures 29, 50, and 65. The sides
of ventilator covers and shelters may be constructed of nominal 1/2 to 5/8 inch exterior type plywood Grade A/C conforming to NN-P-
530 or nominal 1 inch tongue and groove lumber. Louvered ends will be covered with standard aluminum insect screen. The interior
and exterior wood surfaces of the ventilator cover including the louvers shall be painted with two (2) coats of Deck Gray paint
conforming to MIL-P-699, Type A to prevent decay, delamination and dry rot. When louvered and screened openings in covers do
not provide sufficient ventilation, such devices as rotating vane-type ventilators will be installed. Hull dram plugs will be removed and
stowed. Shielding of installed deck equipment will be designed to promote air circulation to the item.
22. Ballast. All temporary solid type ballast such as pig iron, chain, blocks, etc., shall be removed when vessel is placed in storage.
Section II. WET STORAGE
23. General. Vessels will be wet stored only when dry storage is not feasible. Long term wet storage of wood hulls is particularly
undesirable because of possible damage by marine organisms.
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