| 摘要 |
PCT No. PCT/GB96/02186 Sec. 371 Date Jun. 29, 1998 Sec. 102(e) Date Jun. 29, 1998 PCT Filed Sep. 5, 1996 PCT Pub. No. WO97/10993 PCT Pub. Date Mar. 27, 1997An underwater vehicle having a negative buoyancy and thrust units by which it can hover is described. Slow speed maneuverability while hovering is achieved by moving the position of a mass fore and aft and/or side to side such as to cause the vehicle to pitch or roll and thereby vector the otherwise vertical thrust such that the vehicle is propelled in the direction in which the mass has moved.
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