Special Design Ships

TM 55-2320-279-14

SEABEE barges or LASH lighters, the vehicles

6-5. Special Design Ships

must be secured with blocking and tiedowns as

Seatrain vessels, roll-on/roll-off (RORC) vessels,

shown in figure 63 and materials applied as indi-

landing ships, and attack-cargo vessels are all

cated in tables 61 and 62. Barge stability is no-

equipped with patented lashing gear and pre-posi-

ticeably affected by the placement of heavy items;

tioned fittings in the deck. With proper application

therefore, the HEMTTs should be loaded in a

of lashing gear, blocking and bracing will not be

manner to counterbalance variations in the loca-

required, Different classes of RORO vessels have

tions of the center of gravity. (After loading one

different grid patterns for pre-positioned fittings.

vehicle in one end of a barge or lighter, load an-

RORO ships are ideal for transport of the

HEMTTs.

other vehicle in the opposite end before loading a

vehicle next to the first vehicle.) Shoring is not

6-6. Barges and Lighters

generally used beneath vehicles equipped with

The HEMTTs can be transported in SEABEE

rubber tires. Deck surfaces should be dry and free

barges and LASH lighters, with hatch covers in

of grease and/or debris.

place. When the HEMTTs are transported by

Table 6-1. Bill of Materials for Blocking and Tiedown of HEMTT in General Cargo Vessel (Fig 6-3)

Table 6-2. Application of Materials for Blocking and Tiedown of HEMTT in General-Cargo Vessel (Fig 6-3)

one end that fits into a deck cloverleaf. On vessels

6-7. Landing Ships, Landing Crafts, and Amphibious

that do not have cloverleaf and patented lashings,

Vehicles

a suitable substitute may be used. When the

When HEMTTs are moved for extended distances

HEMTTs are moved to or from vessels secured to

or through rough waters, blocking and tiedowns

piers or in sheltered anchorages, only tiedowns

must be used. In most cases, the vessels are

will be required.

equipped with turnbuckles with a sheep's-foot on

173-131