FUZING

COLOR

OVERALL LENGTH

MAX. BODY DIAMETER

TOTAL WEIGHT

DESCRIPTION:

Cylindrical tinplate body, containing aluminum powder, and a detonator-burster charge which explodes when the marker is dropped on the sea, rupturing the body and scattering the aluminum powder container therein. The body has an internal strengthe-ning band near each end. A tail cone is soldered to the body, and carries the fins to which a tail drum is secured. At the other end, the body is closed by a steel diaphragm. The diaphragm has a central opening, threaded to receive a plug, which carries a deto-nator-burster tube. A nose is fitted to this diaphragm and secured in position by three set screws. Screwed into the nose is a striker guide in which slides a striker needle, se-cured to a striker head which projects outside the nose. When in its operative position, a transit safety pin engages with the striker head, preventing it from moving inwards. A second safety pin is provided in the nose. This pin is flanged and is spring-loaded out-ward, but normally is held in its operative position by a split pin to which a withdrawal wire is secured. A securing wire is passed through the eye of the split pin, around the head of the safety pin and the nose of the marker, and through a boring in the transit safety pin.

FUNCTIONING:

When the sea marker has been prepared for use and dropped on the surface of the sea, impact of the striker head with the water drives the striker needle inwards and ex-plodes the detonator-burster charge, which disrupts the body and tail cone and scat-ters the aluminum powder.