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 TB 55-1900-232-10
TABLE 2-1. U.S. Navy Craft Not Recommended for Open-Ocean Tows.
CRAFT
REASONS FOR
CLASSIFICATION
NON-RECOMMENDATION
LCU, YCU Landing Craft
Low freeboard. Light construction of bow door locking
LCM8, LCM6 Landing Craft
mechanism. Structure can be strengthened to reduce risk.
YFU, YFB, LWT
YFNG, YFNX Lighter,
All have deck-mounted equipment which requires installing
YNG Gate Craft,
special protection before towing.
YSR Sludge Removal Craft
All tend to be top-heavy (have high center of gravity) and may
YM Dredge,
also have poor watertight integrity. Topside high weights
YPD Pile Driver,
may require removal and stowage prior to open-ocean
YD Crane
towing to attain adequate stability. All require
LSMR
special preparations
YSD (formerly
Low freeboard and high weights reduce sea-keeping ability.
Seaplace Derrick)
Weights may require removal and stowage to
improve stability at sea.
YTL Small Harbor Tug
Hulls considered too small for open-ocean tows. Should be
PTF Patrol Boat
trans ported as deck cargo.
Mini-ATC, LCPL
Low freeboard. Light construction with poor watertight
MK2, MK3, MK4, MK5
compartmentation and weak to no attachment points for
personnel boats
towing.
MK1, MK2 65'utility
Low freeboard. Deck mounted equipment.
boats, MK4 50'utility
boat, MK3, MK4 40'
2-2
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