4 × 400 metres relay 4 × 400 metres relay The 4 × 400 metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400 metres or one lap. It is traditionally the final event of a track meet. At top class events, the first 500 metres is run in lanes. Start lines are thus staggered over a greater distance than in an individual 400 metres race; the runners then typically move to the inside of the track. Relay race runners typically carry a relay baton which they must transfer between teammates. Runners have a
5"/38 caliber gun mount widely used on amphibious ships, auxiliaries, and merchant ships. The 5"/38 MK 30 is a single enclosed base ring mount widely used on destroyer escorts. The 5"/38 MK 38 is a twin mount specifically designed for newer destroyers. Since this gun fires semi-fixed ammunition, each round is delivered to the gun in two pieces – a projectile and a powder case. Depending on the mount, a 5"/38 caliber gun could have a crew of from 15 to 27 personnel in the gun room and upper handling room. This does not include the personnel needed in the magazines during extended