. Commercial fisheries review. Fisheries; Fish trade. 48 THE VIEW FROM A STORIED SUB The 'Alvin' Off Norfolk, Va. By R. L, Edwards* and K. O. Emery** On July 17 and 18, 1967, the authors made 2 dives in DSRV "Alvin," the research sub- marine of the Woods Hole Oceanographic In- stitution. The dives were made from the support vessel "Lulu" off Norfolk, Virginia, in 20 to 25 fathoms. During each dive, which lasted nearly 7 hours, we observed closely a series of underwater ridges and their fauna. These were the first dives for both of us and we were not disappointed. Alvinis a
. Commercial fisheries review. Fisheries; Fish trade. 48 THE VIEW FROM A STORIED SUB The 'Alvin' Off Norfolk, Va. By R. L, Edwards* and K. O. Emery** On July 17 and 18, 1967, the authors made 2 dives in DSRV "Alvin," the research sub- marine of the Woods Hole Oceanographic In- stitution. The dives were made from the support vessel "Lulu" off Norfolk, Virginia, in 20 to 25 fathoms. During each dive, which lasted nearly 7 hours, we observed closely a series of underwater ridges and their fauna. These were the first dives for both of us and we were not disappointed. Alvinis a deep-diving research vessel de- signed specifically for oceanographic re- search. The funds for construction and oper- ation were provided by the Office of Naval Re- search. The Bureau of Ships of the U. S. Navy assisted in preparing performance specifica- tions. The Applied Sciences Division of Lit- ton Industries designed and built the sub. Shape of the Sub At the surface, Alvin draws 7 feet. It is 23 feet long, has an 8-foot beam, and dis- places 15 tons. Submerged, it has a range of 5 miles and cruises at a little more than 1 knot, with a top speed of about knots. Its design operating depth is 6,000 feet, where it has a safety factor of more than two. The crew, a pilot and 2 observers, has 4 viewing ports to look through--to see ahead, on either side, and directly beneath the vehicle. The passenger sphere is 7 feet in diameter. It is madeof high-strength, steel. The life-support systems provide for an en- durance of 24 hours or more. Alvin is not large inside. After several hours with a pilot and 2 observers aboard, things begin to feel a bit cramped. The dis- comforts are minor, however, compared with all the interesting things to be observed out- side. And, to help the observers work, the sub is equipped with a tape recorder, televi- sion camera, and 2 automatic 35-mm. cam- eras. Also, each observer can carry a hand- ''^Fishery Research Biologist, BCF
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