''In the early stages of the war, the RADAR tended to be neglected by the upper echelons of the military, but in the latter part of the war, it became a very important piece of equipment for all ships.<br>In particular, the type 13 and type 22 radars, which were relatively small and have endured practical use to some extent, were equipped on the masts of destroyers and larger ships that survived until the latter half of the war, and were some of the few practical radio signals used by Japanese ships, that would support the lower battlefield as eyes.