In this case, two torpedoes are launched, port and starboard, each
diverging to its full extent; when passing the vessel attacked, one
or the other of the tow-ropes is brought across the cut-water, and by
the simultaneous motion of the two vessels in opposite directions,
the torpedo is brought alongside of or under the bottom of the vessel
attacked, as shown by the drawing. The torpedo vessel should keep the
masts of her enemy in one until close to, when either torpedo will be
used, according to the movement of the enemy. At the time of the tow-rope
taking the cut-water, the brake is suddenly eased up; the tow-rope will
then pass under the bottom, when, by checking the tow-rope, the torpedo
will be hauled under the bottom.
[Illustration: Plate 9.
Kell Bros. Lith. London.