MIL-P-29191B(YD1)
and as may otherwise be required for the design being furnished.
The
transverse
Each
bulkheads shall run vertically from the bottom to the top of the hull.
storage compartment shall have solid decking in its bottom which is attached to
the hull on either side and the transverse bulkheads fore and aft.
The effect
of this requirement shall be to isolate the interior of the storage compartment
from all in-place flotation, protecting the flotation from water intrusion.
The
transverse bulkheads and storage compartment decking shall be attached to the
hulls by a material that shall be chemically cross-linked to the hull material
for plastic reinforced hulls or by the manufacturer's standard method of
The method chosen shall provide a
attachment for steel or aluminum hulls
water tight seal
3.4.2 3 Foam.
Each hull shall be foamed to provide positive buoyancy with
poured-in-place, closed cell, oil-resistant polyurethane foam having a density
not exceeding 2.2 pounds per cubic foot-
The hulls shall be foamed throughout
to the bottom of the storage compartments, and to a height within 2 inches
(nominal) of the top of the hull in those spaces between the storage
A typical longitudinal section is depicted in Figure 1.
compartments
3 4.2.4 Lifting eyes.
Each outboard hull shall have two lifting eyes
recessed in the deck; one fore and one aft, with covers provided for the
recesses to insure a continuous deck surface.
Each lifting eye shall have a
pull-out strength adequate to comply with the tests of 4.6,4 and 4.6.5.
The engine well shall have a transverse bulkhead as
3.4.2.5 Engine well.
described in 3.4 2.2 located a minimum of 15 inches forward of the transom.
This bulkhead shall be the aft bulkhead of the battery or fuel storage
The engine well shall be self-draining.
compartment .
3.4.3 Platform deck.
The platform deck shall be designed and constructed in
a manner to pass the tests specified in 4.6.3 through 4.6.6, 4.6.9, and 4.6.10.
The deck may be made from fiberglass, plywood, or other material conforming to
above tests.
The deck shall be flat and have no protrusions extending above its
surface except for the operator's control station, the safety rails when they
are in place, and as permitted under 3.4.3.5.
Deck framing shall be aluminum
Filler metal for
for plastic and aluminum hulls, and steel for steel hulls.
welded aluminum joints shall be compatible with the base alloy.
Plywood, when
used for the deck surface, shall be marine grade having a nominal thickness of
not less than 5/8-inch and shall be faced with a high density cellulose
fiber/resin overlay not less than 0.009-inch thick.
Exposed edges of any
recesses or openings cut into plywood decking shall be sealed or otherwise
suitably protected against moisture penetration,
Deck shall be able to accept
slip-resistant coating as specified in 3.4.3.7.
3.4.3.1 Bumper system.
A D-type or tapered D-type bumper system shall be
The bumper
installed along both sides and across the bow of the platform deck.
shall be not less than 3 inches high and 3 inches wide and shall be made of EPDM
rubber . The corner transition between front and sides shall be fitted with a
molded transition piece.
The shape of the bumper bore shall be determined by
the contractor, but shall be of such design as to resist collapse upon impact.
There shall be no gap between the edge of the deck and the beginning of the
The bumper, in effect, shall be a smooth extension of the deck
bumper radius.
forming a radius over which the oil containment boom can be deployed without
hooking or snagging.
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