Patent ID: 6896445

Claim:
Apparatus for underwater applications, comprising: a modular unit having a top wall, a bottom wall, two side walls and two end walls interconnected to form a hollow interior; each of said side walls having a tapered section formed with a through bore which intersects said hollow interior; each of said end walls extending generally vertically between said bottom wall and said top wall, said end walls each being formed with a through bore which intersects said hollow interior; said top wall being formed with a through bore which intersects said hollow interior; said modular unit being capable of being placed in an upright orientation with said top wall vertically above said bottom wall, and in an inverted orientation with said top wall vertically below said bottom wall; said tapered section of each of said side walls being formed so that when one modular unit is placed in an upright orientation said tapered section of each of said side walls thereof is capable of engaging said tapered section of one of said side walls of a second modular unit placed in an inverted orientation adjacent thereto with said through bores in respective ones of said tapered sections aligning with one another.