u03 - AWOIS 1609

NM22/46 -- DERRICK BARGE WRECK LIGHTED BUOY 3, BLACK, QK FL GREEN, ESTABLISHED IN 62 FT., 1.75 MILES, 63 DEG. FROM SCOTLAND LIGHT VESSEL. BUOY LOCATED 200 FEET EAST OF SUNKEN WRECK WHICH LIES IN A SE-NW DIRECTION.

H10224/86 -- OPR-C121-WH-86; MAIN SCHEME HYDROGRAPHY AND SIDE-SCAN SONAR INVESTIGATION REVEALED WHAT APPEARED TO BE A WRECK IN FOUR PIECES 447M SW OF WRECK; FOUR DIVES WERE PERFORMED IN 1987; FOUND A BARGE, APPROXIMATELY 50 X 120 FT WITH A PNEUMATIC DEPTH GAUGE LEAST DEPTH OF 63 FT; 0-5 FT VISIBILITY; A STRUCTURE SIMILAR TO A DERRICK CRANE WAS FOUND; HYDROGRAPHER AND EVALUATOR RECOMMENDED DELETING CHARTED SYMBOL AND ADDING 63 WK AS SHOWN ON PRESENT SURVEY. (UPDATED MSD 4/91)

24 NO. 1350; BARGE, SUNK 5/30/46; POS. ACCURACY WITHIN 1 MILE;


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aluminum tanks

Scuba tanks are made out of steel or aluminum. Aluminum is cheaper and has somewhat better corrosion resistance, but steel is stronger. The "standard" modern scuba cylinder is the aluminum "80", which actually holds about 77 cubic feet of air at its rated pressure of 3000 psi. This type of tank has probably caught on because for an average-sized person with reasonably good breathing skills, this size is just big enough to cover your allowable no-decompression bottom time and no more. For smaller people, 63 cubic foot aluminum tanks are available, while for larger folks there are choices as big as 120 cuft.