Manual for submarine miningUnited States. War Department
History
Manual for submarine mining
United States. War Department
Submarine mines -- Handbooks, manuals, etc.
6. If, in planting, the vessel moves _against_ the direction of the
current, there is little danger of overturning the distribution box
boat if ordinary caution is observed. Should it be necessary to plant
against a cross current or with it, it is best to pass the cable end to
the distribution box boat by a launch or small boat. In this way the
planter need not pass within 50 or 75 yards of the boat.
7. To avoid getting foul of the buoy rope or mine after the mine is
dropped, the helm should be put over so as to throw the stern away
from the mine. The vessel should be under good headway so that the
propellers may be stopped until they are well past the buoy and buoy
ropes of the mine. These points are important; failure to observe them
will result disastrously.
In laying multiple cable, the course of the vessel invariably should
be against the current. Rather than lay cable with the current it is
advisable to postpone laying the cable until a change of the tide
causes a favorable direction of current. In the end, time will be
saved by waiting. Cable should pay off on the _upstream_ side of the
vessel if any cross current is running. All care should be taken that
the cable does not get caught in the vessel’s propellers. This is of
the greatest importance.
As the cable pays out over a chock near the bow of the vessel a man
should stand by with a 3-inch strap in readiness to stop the cable
should it be necessary, and two men should manipulate brakes to prevent
the cable from paying out too rapidly. This is especially necessary if
the water is deeper than 50 feet.
Especial care is necessary in planting mines to avoid: (_a_) Colliding
with yawl or distribution box boat; (_b_) picking up cable in the
propeller; (_c_) getting the mine cable tangled; (_d_) drifting over
the mine after it is dropped.
APPENDIX NO. 7.
MANUAL FOR SMALL BOATS.
The left-hand side of a boat or ship, looking toward the bow, is the
_port_ side, and the other is the _starboard_ side. The men who row
on the port side are called the _port oars_ and those rowing on the
starboard side are called the _starboard oars._
Boats are called single or double banked, according as they have one or
two oarsmen to a thwart.
_Thwarts_ are the seats on which the crew sits; the space abaft the
after thwart is called the _stern sheet_.
_Floorings_ and _gratings_ are the bottom boards of a boat. They
prevent the weight from bearing directly upon the planking.
The _gunwale_ of a boat is the upper rail.
The _yoke_ is an athwartship piece of wood or metal fitting over the
rudderhead.
_Yoke lanyards_ are the small lines made fast to the ends of the yoke,
by which the rudder is turned and the boat steered.
The _stem_ is the upturned portion of the keel at the bow of the boat,
to which the forward ends of the planks are secured.
Oars are said to be double banked when two men pull one oar.
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