u05 - AWOIS 7940

H10224/86-88 -- OPR-C121-WH-86-88; SIDE-SCAN SONAR AND DIVER INVESTIGATION OF CONTACT SHOWING DEFINITE WRECK CHARACTERISTICS; DIVERS FOUND A DETERIORATED WOODEN VESSEL WITH ROTTED WOODEN DECK PLANKING WHICH WAS MOSTLY SILTED OVER BY SAND; ONLY LARGE DECK TIMBERS REMAIN; NO MACHINERY FOUND; RIBS WERE OBSERVED RISING UP OFF THE BOTTOM ALONG THE EASTERN SIDE OF WRECK; DIVER GAUGE LEAST DEPTH TAKEN ON TOWING BITS AT THE NORTHERN END OF WRECK; LARGE DECK TIMBERS WERE SEEN ON WESTERN SIDE OF WRECK; 50 FT SW OF MAIN WRECKAGE, DIVERS FOUND WHAT APPEARS TO BE A PORTION OF THE SAME WRECK, RUNNING NW-SE, WOODEN RAIL-LIKE TIMBERS STICKING UP OFF THE BOTTOM 6-8 INCHES; ALSO APPEARS TO BE DETERIORATED; ON SECOND DIVE, A PILE WAS DISCOVERED ABOUT HALFWAY DOWN THE WRECK AND A PNEUMATIC DEPTH GAUGE LEAST DEPTH OF 46 FT WAS TAKEN ON IT; BEAM MEASURED 40 FT; LENGTH WAS 120 FT. (ENTERED MSD 4/91)


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Gammarus

Amphipod crustaceans typically range in size from 2 to 50 mm, although a few may be larger. Amphipods are common in aquatic ecosystems throughout many parts of the world, inhabiting marine, brackish, and freshwater environments. A few species are also terrestrial. Amphipod means "different foot", a reference to the varied legs that are evident in the illustrations, as opposed to isopods.

The order Amphipoda, which contains nearly 7,000 described species, is divided into three suborders: Gammaridea, Caprellidea, and Hyperiidea. Gammaridea, with more than 5500 described species, is not only the largest amphipod suborder but also contains all of the freshwater and subterranean taxa. Approximately 21 superfamily groups, 95 families and more than 1000 genera are recognized within this suborder.