a launchable a fin - stabilized round having an he warhead that is fully telescoped in a cartridge case . the round has a forward , cone - shaped nose section , a base section with a booster cavity and a high - explosive cavity located therebetween . an he charge is positioned in the he cavity and a booster charge is positioned in the booster cavity . a time fuze , mounted in the booster cavity , has a presettable counter that is set by the gunner at firing via a hardwire data link through an electric primer . the tiem fuze will fire the booster charge a predetermined time period after the round is launched to enable a normally disabled proximity fuze that is mounted in the nose section . the proximity fuze will detonate the he charge upon detection of a proximate target . also mounted in the nose section is a contact switch for detonating the he charge upon impact with a hard target .