OVERALL LENGTH (telescope)

OVERALL LENGTH (extended)

MAX. BODY DIAMETER

WEIGHT

COLOR

DESCRIPTION:

Body inner case of sheet metal, the lower end of which is pressed on to a heavy apertured head. The aperture in the head is sealed by a paper disc and is traversed by a pin. To the upper end of the body inner case a circular retaining piece is secured. In-side the body inner case is a fabric bag containing aluminum powder, each end of the bag being tied with thread to close it. The thread at the lower end of the fabric bag is passed around the pin, to hold the bag in contact with the head. A body outer case slides over the inner case. At its upper end the body outer case is closed by two mill-board discs, and inside its lower end a circular retaining piece is secured to provide a stop to prevent its being withdrawn completely from the body inner case. Immediately below the millboard discs a cutter is provided. The cutter is a ring secured inside the outer case and cut across in four places at about 45 degress, the cut ends bent up at right angles to form four projections within the outer case.

FUNCTIONING:

The head is the heaviest part of the marker and consequently will strike the water first. Impact with the surface of the water breaks the paper disc sealing the aperture in the head. Water enters this aperture and carries the fabric bag rearwards from the head, breaking the thread which anchors it to the pin and also ejecting the millboard discs sealing the aperture at the tail end of the body outer case. As the bag passes through this aperture it strikes the sharp projecting parts of the cutter, which slit it, releasing its contents. As a result a patch of aluminum powder is formed on the surface of the sea.

REMARKS:

The marker contains no explosive.