Identification cap of the Air Program Development Unit, Development Group, Japan Maritime Self-Defense Force. Since it is an identification cap, it is not an official item. Unused. [Origin of the Air Program Development Unit Squadron Mark] The shape of the mark is a shield, expressing the will to be a part of maritime defense, and the base color is navy blue, hoping for the inheritance and development of intelligence and technology. The four arrows at the bottom of the APC logo represent the four programs of the aircraft P-3C, XP-1, SH-60J, and MH-53E, which were in charge of maintenance and management at the time of the unit's establishment, with yellow to represent the electrons moving within the computer. In addition, the triangle on the lower right of the logo represents the ASWOC program of the ground system. ↑ Quoted from the Development Group website