800 Fathoms (c) 1981 U.S. Billiards.
An old horizontally scrolling shoot'em up with a vertically scrolling background :). The player has to guide a submarine armed with torpedoes and missiles through five levels while fighting different underwater terrors. At the end of each area the boss-submarine appears.

>>> TECHNICAL DETAILS
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Cabinet dimensions : 67.5'' high x 25.5'' deep x 28'' wide
Weight : 235 lbs
Main CPU : Z80 (@ 3.072 Mhz)
Sound Chips : AY8910 (@ 1.78975 Mhz)
Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.61 Hz
Palette colors : 114
Players : 2
Control : 8-way joystick
Buttons : 2

>>> TRIVIA
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Licensed from Amenip to U.S. Billiards for US distribution. 800 Fathoms is known outside US as 'Mariner'.

>>> OTHER GAME RESOURCES
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Game's rom.
Machine's picture.