The Ocean Battle

Cheat Codes:
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Since the game instructions are in Japanese, 

Roll to Left           : [ cursor left ] key
Roll to Right          : [ cursor right ] key
Nose Up                : [ cursor down ] key
Nose Down              : [ cursor up ] key
Thrust Up              : [ A ] key
Thrust Down            : [ Z ] key
Shoot                  : [ space ] key
Missle                 : [ M ] key
Appear the area map    : [ Q ] key
Disappear the area map : [ W ] key
Normal view            : [ F1 ] key ( camera is fixed )
Extend view1           : [ F2 ] key ( inside view )
Extend view2           : [ F3 ] key ( outside view )
Pause                  : [ ESC ] key