minisubmarine
- n submersible vessel for one or two persons; for naval operations or underwater exploration
- Spyfish is a battery-powered minisubmarine tricked out with cameras and floodlights and operated by wireless remote control.
- The vanguard of the $500,000 expedition has already arrived on the scene; soon the hunters will begin using such formidable weaponry as a sonar-equipped minisubmarine and .