Akatsuki

the Akatsuki (暁) is a toho vehicle first used in the 1975 movie terror of mechagodzilla

history: after the battle between godzilla and mechagodzilla from the previous movie the Akatsuki is searching for the remains of mechagodzilla when they see something swimming close them it hits the submarine the thing stands up and it titanosaurus the Akatsuki tries to resurface then titanosaurus comes up on land and jumps on the submarine crushing it then ripping it apart