TM 55-1930-209-14&P-1
16-16 Anchoring with two anchors. Wind, sea, and current direction and force must be known and carefully
considered in selecting which two anchors will be used. When anchors have been selected and water depth allows tug
sufficient maneuvering, the best method is a modification of the method provided in paragraph 16-15.
a.
The barge is towed in close to designated anchoring site and tug casts off the tow.
b.
Based on wind and sea conditions at the anchoring site, tug then positions the barge on its hip (Figure
16-1) so tug is on downcurrent side as tug moves barge towards shore. Tug will have its bow pointed
toward the barge's stern.
c.
Tug moves barge over position for first anchor. Barge lowers (using power, not a free fall) first anchor to
the seabottom. As tug maneuvers barge towards anchoring position for second anchor, barge pays out
anchor cable.
d.
With first anchor positioned, tug moves barge to its final position and holds barge in this position.
e.
The barge, using its bow crane, if appropriate, passes second anchor to auxiliary vessel. The auxiliary
vessel, as barge pays out anchor cable, takes second anchor out to its anchor position, and drops it.
f.
Using anchor winches, barge crewmembers set these two anchors. When these anchors are set, tug
casts off, moves away from barges, and stands by.
g.
Bargemaster takes bearings on several landmarks to check that anchors are holding.
h.
When bargemaster determines that anchors are holding, the winches are turned off, the electric brakes
are automatically set, and the mechanical brakes are set to backup electrical brake.
i.
Tug is released from its standby position.
16-17 Anchoring with single anchor. As in anchoring with two anchors, knowledge of wind, sea and current direction
and force, and seabottom conditions is critical. These factors must be considered not only in selecting which anchor to
use, but also in selecting anchoring site in relation to shore facility (Figure 16-5).
a.
The barge is towed in close to designated anchoring site and tug casts off the tow.
b.
Based on wind and sea conditions at the anchoring site, tug then positions the barge on its hip (Figure
16-1) so tug is on downcurrent side as tug moves barge towards shore. The tug will have its bow pointed
toward the barge's stern.
c.
Tug moves barge over position for the anchor. Barge lowers (using power, not a free fall) selected
anchor to the seabottom. As tug maneuvers barge to its final position, barge pays out anchor cable.
d.
With anchor positioned, tug moves barge to its final position and holds barge in this position.
e.
Using anchor winch, barge crewmembers set this anchor.
f.
Tug casts off, moves away from barge, and stands by.
g.
When anchor is set, bargemaster takes bearings on several landmarks to check that anchor is holding.
h.
When bargemaster determines that anchor is holding, the winches are turned off, the electric brakes are
automatically set, and the mechanical brake is set to back up electrical brake.
i.
Barge is allowed to swing into a position according to the sea conditions. If barge anchoring has been
properly planned, the barge's stern is pointing at the shore facility. The shore discharge hose, when
deployed, should run straight to the shore facility from the center of the hose fenders.
j.
If this is not possible, tug should take barge on its hip and retrieve the anchor. A new position should be
selected for anchoring and anchoring procedures should start again with paragraph c above.
k.
Tug is released from its standby position.
16-10
