British Bomb, 250 lb TI, No. 19 Mk 1, No. 19 Mk 2 Sea Marker
The body, tail plate, and burster container of the Bombs No. 19 Mk I and Mk II are the same as those of the corresponding marks of the T.l. Bombs No. 1.
The ejector plate is secured by screws to a ring, which is welded to the inner edge of the nose. A canister of thin steel rests on the ejector plate, and is held in position by a thin diaphragm soldered to the inside of the body just beneath the tail plate. The inside of the canister is divided in two by a thin dished plate. The upper part of the canister forms a buoyancy chamber, while the lower part is filled with a sodium phosphide-phosphorus mixture. The lower part of the canister is pierced by several water-inlet holes, which are covered by wire netting. Six wooden battens extend along the outside of the canister to force off the tail plate.
Tail Construction: Same as for the No. 1 T.l. bomb tails.
The bomb is suspended by a single lug, which is welded to the body.