(V)
The tow-rope for large torpedo can be of 2½ in. or 3 in. hemp, or 1½ in. flexible galvanized iron wire. For small torpedo, 1½ in. to 2 in. hemp, or ⅞ in. wire.
The buoys are made of solid cork (such cork only being used as will ensure great floating power after being immersed for a time), it is built up on a galvanized iron tube, running longitudinally through; on the ends of the tube are screwed wooden cones, which bind all together and render the buoy indestructible. The iron tube gives great facility for stringing on the number of buoys required.
Drawing (W). Section on A B.
Two buoys are generally used for the large torpedo, and one for the small. The buoy-rope is of hemp, about five or six fathoms in length and two inches circumference, an eye being spliced in the end nearest the torpedo; to this eye is bent the tow-rope with a single or double sheet bend, forming the knot by which the torpedo is towed; the other end of the buoy-rope is passed through the large or small ring in the stern (according to whether working in deep or shallow water), then through the tube of the first buoy, an overhand knot made in the rear; then through the next buoy, and a knot in the rear of that.
Drawing (X).
