Patent ID: 7281484

Claim:
A surface and subsurface operational watercraft capable of resting stationary at bottom of a water body having an elongated body with a midbody region, a forward end which is approximately wedge-shaped in planview with its narrow end forward, and a rearward end which is approximately wedge-shaped in profile view with its narrow end rearward, said elongated body further characterized in having a height in side view adjacent said forward ends which is substantially less than the width of said elongated body adjacent said rearward end, with a midbody height in side view which is substantially larger than the height in side view adjacent said forward end an overall streamlined surface envelope of said elongated body with a total body volume; a primary interior dry volume having a structural midbody portion capable of supporting external water pressures when submerged; and a secondary interior volume which is adapted to be flooded for stationary resting at the bottom of said water body with equal water pressure between water outside and inside said secondary interior volume.