Also called 'scanners'. They were the eyes of the cockpit. Ensuring landing gear was up or down securely. Letting the cockpit crew know of anything strange happening with the engines or any control surfaces.., and there other job was to spot for enemy fighters.., although by the time the 330th began her jaunts over the Empire there were not that many good fighter pilots left in the Japanese mainland. They were mainly 'kids'. Very inexperienced and mainly put up there for the role of calling out altitude for anti-aircraft batteries on the ground.