Modification A00064 - US Coast Guard Response Boat-Medium

USCG Response Boat – Medium (RB-M)
HSCG23-06-D-ARB001
582 [Orig] MOORING, TOWING AND TIE DOWN FITTINGS
582-1 [Orig] General
582-1.1 [Orig] All towing bitts, mooring bitts and chocks shall be free of sharp edges that
might cause damage to mooring lines or personnel. The working surface of each
bitt and chock shall be polished.
582-2 [Orig] Towing Fittings
582-2.1 [Orig] An aft towing bitt shall be provided on the centerline. The towing bitt shall
be sized to accept one round turn and three figure eights of the towline.
582-2.2 [Orig] The RB-M towing bitt and fittings shall be designed with a factor of safety of
1.1 on the as welded yield strength of the fitting material under an applied load,
equal to the breaking strength of the towing line supplied, as per Section 582-3,
applied at the highest point of the fitting.
582-3 [Orig] Towline Reel
582-3.1 [A00014] A towline reel shall be provided and outfitted with 2-3/4-inch
circumference, Double Braided Nylon Line with 12" eye splices at each end so the
total length of the line is 600 feet to the center of each eye splice. The reel shall be
installed in a location that is readily accessible to the towing bitt. The bitter end of
the line shall be attached to the reel using a light line or other means to provide a
weak link.
582-3.2 [A00064] The towline reel shall be provided with a removable crank handle and a
locking mechanism that prevents it from free wheeling when not in use, the reel
shall have seven evenly spaced holes to allow the wheel to be locked in
multiple positions.
582-4 [Orig] Mooring and Securing Fittings
582-4.1 [Orig] The RB-M shall have a minimum of 4 sets of mooring bitts (or cleats) and
chocks (as necessary), sized for the towline, around the perimeter of the RB-M to
allow for mooring and alongside towing of a variety of craft types. The working
surface of each bitt and chock shall be polished.
582-5 [Orig] Hoisting by Slings Under Hull (Travel – Lift)
582-5.1 [Orig] The RB-M shall be designed to allow lifting of the boat without damage by
dual sling lifts, commonly referred to as a Travel Lift, where the slings pass under
the hull.
582-5.2 [Orig] When using this type of lift the load on each sling shall not exceed 20,000
pounds in the hoisting condition.
582-5.3 [Orig] The use of dual sling lifts shall not require any protective blocking to be
installed.
582-5.4 [Orig] Sling positions shall be permanently marked on the exterior of the boat in
locations that can be easily seen from the main deck.
PART III, SECTION J, ATTACHMENT 2, A00064 PAGE 14 OF 22 SPECIFICATION