The Silent Service

The Maritime Self-Defense Force submarine Yamanami collides with a U.S. nuclear submarine, crushing all 76 people on board, including its CO, Shiro Kaieda. Hiroshi Fukamachi, CO of the MSDF diesel submarine Tatsunami, becomes suspicious of the accident and analyzes the recorded data of the collision.

Fukamachis diesel ship Tatsunami arrives in the area, where the operation is in a standstill after Kaiedas declaration. In an attempt to stop Kaieda, Fukamachi boards the Seabat.

A Japan-U.S. summit meeting is held, but neither country concedes to the others claims. Meanwhile, the U.S. Third Fleet launches an anti-submarine missile at the 2nd Maritime Self-Defense Force convoy led by Commander Numata, which has been dispatched to escort the Seabat.

Kaieda appears at the meeting. The alliance negotiations between Japan and the independent nation of Yamato are reported to the world. As soon as the talks are over, President Bennett identifies the Yamato as a terrorist organization and orders its destruction.