. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 72,3ff 7 2* 00* Fig. 1.—The free vehicle design. A, flotation spheres; B, transponder; C, release mechanisms; D, disposable weights; E, strobe; and F, camera. The first deep-ocean use was at a depth of about 360 m near the head of the Hudson submarine canyon in the mid-Atlantic Bight (39°'N X 72°'W) (Fig. 2). It was deployed, as a complementary part of the DSRV Alvix observations in the canyon, off the cata- maran Lulu, which serves primaril
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 72,3ff 7 2* 00* Fig. 1.—The free vehicle design. A, flotation spheres; B, transponder; C, release mechanisms; D, disposable weights; E, strobe; and F, camera. The first deep-ocean use was at a depth of about 360 m near the head of the Hudson submarine canyon in the mid-Atlantic Bight (39°'N X 72°'W) (Fig. 2). It was deployed, as a complementary part of the DSRV Alvix observations in the canyon, off the cata- maran Lulu, which serves primarily as Alvin's tender. RESULTS The free-vehicle camera unit was deployed from Lulu on September 12, 1972 and re- covered on September 14. During the 42 hour period 582 frames were exposed using an inter- val between exposures of minutes. Fifty-six frames, scattered throughout the filming, were blank, because we assume the strobe did not fire. The camera on this particular lowering was positioned one meter off bottom and pointed at a spot one meter out from the tripod base. The field of view was approximately one square meter. The periphery of each frame was poorly lighted which diminished the distinguishable area by about 25%. Such close proximity to the bottom was necessary because of the highly. Fig. 2.—Hudson submarine canyon with the loca- tion of the camera deployment. Depths are in fathoms. turbid bottom-water common to this portion of the Hudson canyon axis. The free-vehicle camera unit serendipitously came to rest with a tunnel-like burrow about 3 cm in diameter in the center of the field. Ob- servations were made of the activities in and around this hole, frame by frame. Sediments at this site are clayey silts. The large recognizable animals that crossed the field were the crab Cancer borealis, a sea- star Henricia (probably esditricJiti or per- forata), an eel Synaphobranchus sp., the shrimp Sclcrocrangon, an octopus, and a burrowing decapod crustacean. The to
Size: 1596px × 1566px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionamericana, booksponsorlyrasismemb
