Batboat
The Batboat is the fictional personal watercraft of the DC Comics superhero Batman.
Comics
In Sub-Level 6 of the Batcave, there's an aqua-dynamic hydrofoil/submersible (otherwise known as the Batboat) on both the navigable Gotham River and the Atlantic Ocean's waters.
Background
Early in his career, while investigating arms dealers operating along the wharves of Gotham City's Chinatown district, Batman used a prototype Batboat to pursue the fleeing criminals. In what was later regarded as an "extreme measure", Batman destroyed their launch with a bow-mounted flame-thrower.
The first official Batboat made its debut in April 1946 (in Detective Comics #110). The storyline involved Scotland Yard providing Batman and Robin with the boat in order to speed their search for the villainous Professor Moriarty.
Hydrofoil
To submerge, the Batboat's foils retract to reduce parasitic drag. Its aluminum propellers are driven by sealed AH electrolyte batteries.
Cockpit
The Batboat displays include state-of-the-art 'at-a-glance' navigation and communication links, an ascent-rate alarm, a dive-time clock, and a safe-ceiling depth meter.
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