Figure 10-28.A 1500 barrel , 6x18 fuel storage barge.
used as a pier or wharf or, by installing heavy hinges,
could be connected to any existing pontoon wharf to
enlarge or extend that structure.
Essentially, tugs are barges equipped with
outboard propulsion units and the accessories required
for the operations to be performed. The P-series
equipment tugs are widely adaptable and can be used
for towing, causeway tending, placing and retrieving
Figure 10-29.100-ton derrick mounted on a 10 x 30 barge.
anchors, salvage operations, assisting in the
installation and recovery of fuel systems, and other
The 3x14 warping tug shown in figure 10-30 is
equipped with two outboard propulsion units. The
after end of the center string incorporates an anchor
housing to accommodate the 2,500-pound mooring
anchor and also holds the anchor wire away from the
propulsion screws. An A-frame, mounted on the bow
of the tug, stands approximately 13' above the deck of
the barge. A double-drum winch is mounted near the
center of the barge. A line from the after drum is
fairlead to the deck and back to the anchor astern,
while the line from the forward drum is run over a
sheave in the top of the A-frame and is used for lifting
over the bow or pulling from the bow of the warping
tug. The winch is mounted on a welded steel
cross-braced frame. Standard equipment for the tug
also includes M147 double bitts and navigation lights.
The warping tug is approximately 90' long and 21'
wide, has a stem draft of 48", a bow draft of 18", and
a speed of 6 1/2 knots. The 3x14 warping tug replaces
the 3x12 tug throughout the pontoon system. The
only difference in these two is that the 3x14 tug is
longer by two P1 pontoons and incorporates new style
winches with lines feeding off horizontally laid