by expelling liquid ballast

Full Title

Marine torpedoes, e.g. launched by surface vessels or submarines; Sea mines having self-propulsion means > adapted to be used for exercise purposes, e.g. indicating position or course > with means for causing torpedoes to surface at end of run > by expelling liquid ballast

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

AMMUNITION; BLASTING

Subclass:

EXPLOSIVE CHARGES, e.g. FOR BLASTING; FIREWORKS; AMMUNITION