Table 61. Bill of Materials Blocking and Tiedown of Mine Dispenser in General-
Cargo Vessel (Fig 62)
Douglas-fir, or comparable, straight-grain, free
from material defects; Fed Spec MM-L751 H:
4 linear ft
2- x 4-in.
38 linear ft
4- x 4-in
1 linear ft
2- x 12-in.
Common, steel; flathead, bright or cement coated;
Fed Spec FF-N105B:
6 x 19, IWRC; improved plow steel; preformed, reg-
ular-lay; Fed Spec RRW-410C: 5/8-in.
Wire rope, U-bolt clips, saddled, single grip, steel,
Crosby heavy-duty or equal: MILSTD 16842: 5/8-
Eye-and-jaw type, l-in. dia x 12-in. takeup; Fed
Spec FFT791b or equal
Table 62. Application of" Materials for Blocking and
mine dispensers should be loaded symmetrically
Tiedown of Mine Dispenser in General-Cargo Vessel
in sequence about the centerline of the barge in
a manner to counterbalance variations in centers
of gravity, that is, alternate head to tail.
Side blocks. Each to consist of 4- x 4- x
108-in. lumber. Locate one piece cen-
tered against outside of each pair of
6-6. Roll-on/Roll-off (RORO), Seatrain,
Landing, and Attack Cargo Ships
End blocks. Each to consist of 4- x 4- x
108-in. lumber. Locate on top of item
A and against wheels as shown in fig-
When mine dispensers are loaded on vessels that
ure 62. Toenail to item A with four
are adequately ventilated by power blowers, such
50d nails at each end of each item B.
as RORO vessels, the fuel need not be drained and
Backup cleats. Each to consist of one
batteries need not be disconnected.
piece of 2- x 4- x 12-in. lumber. Locate
on top of item A against the joint of
a. Loading. Mine dispensers, in operational con-
each item B. Nail to item A with four
figuration, can be towed by their prime movers
20d nails each.
aboard vessels having roll-on capability.
Wire rope. Form a complete loop through
b. Securing. RORO, Seatrain, landing, and at-
each mine dispenser tiedown provision
and the eye of a turn buckle. Overlap
tack cargo ships are equipped with patented lash-
wire rope ends at least 18 inches.
ing gear and pre-positioned fittings in the deck.
Clips. Place four on each wire rope at the
The use of such equipment is adequate, and block-
overlap area, and space 3¾ inches
ing and bracing are not required. Figure 6-3
apart, a minimum of 6 inches from ends
shows suggested tiedown details for a mine dis-
of wire rope. Details for placement of
clips may be found in figure 5-2. Tighten
penser aboard a RORO vessel, using four 35,000-
so that wire rope cannot slip.
pound-capacity (M35) lashings.
Turnbuckles. Attach jaw end to padeye
built into vessel deck. Tighten as re-
Brace. Consists of one piece of 2- x 12- x
6-7. Landing Craft and Amphibians
12-in. lumber and one piece of 4- x 4-in.
lumber, length cut-to-fit. Place 2- x 12-
When transporting the mine dispensers for ex-
x 12-in. piece on vessel deck, under
tended distances or through rough waters, block-
reach tube, aft of the lunette. Force fit
the 4- x 4-in. cut-to-fit piece between
ing and tiedowns must be used. In most cases,
the 2- x 12- x 12-in. piece and the bot-
landing craft and amphibians are equipped with
tom of the reach tube aft of the lunette.
lashings and deck fittings. When lashing are not
Toenail with four 20d nails.
provided, a suitable substitute may be used.