Glacier (WAGB 4) - Naval Cruise Book

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Arctic Survey Boat The ASB works independent of Glacier at Palmer Station. This ear, the Polar Star ferried it to Palmer for us. MK1 Mi- chalski rode down with the ASB while BMC Mulford and ET 1 Manning flew down and met the Polar Star at Punta Arenas for the ride to Palmer. Once again the ASB concentrated on ferrving scientists about, acting as a platform for conducting plankton and krill tows, and taking water samples. After over 3 months at Palmer the ASB crew rejoined Glacier for the trip back home. PPP BMC Mulford ET1 Manning MK1 Michalski 7 1! ie Back in the cradle and headed home. Returning to the nest after three months away 27

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ABOVE: Dr. Sullivan returns to home base. RIGHT: Divers pre- pare to take photographs and collect algae samples from the ice. 26 Small Boats Do a Big Job During the Ameriez Cruise, Glacier would head to a designated spot and set up a superstation. There Glacier acts as a home base where field crews head out in the zodiacs to conduct dive operations, penguin and seal samplings and take ice cores. Deck Force was invalu- able to the research: getting zodiacs underway on short notice, provid- ing coxswains and maintaining the zodiac ' s condition. The zodiacs gave the scientists access to all parts of a superstation and allowed free- dom of movement independent of each other and the ship.

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SCIENCE CRUISE 1 | RICE U HELD TEAM Science Cruise 1 (2 1 Jan to 2 1 Feb) was strictly a marine geological survey of the area around the Bra nstield St rait. Gerlache St rait and Marguerite Bav. The survey was aero-photography (still and video) of the glacier and shore- line, box coring, piston coring, bottom grabs, seismiclines and hydrocasts. Some of the objectives were to: ( 1 ) Construct detailed bath metric, sedimen- tologic and tectonic maps of the Bransfield Basin, (2) Describe sediment types and dispersal patterns within fiords in relation to the glacial and geo- logic setting (3) Examine subaqueous glacial features and bedforms and (4) invest igate the more recent glacial climatic record of the area using the sedi- mentary record. ABOVE Piston Corer ABC VE: Box Corer 28 NCSU HELD TEAM The scientists from North Carolina State University collected box cores from 46 stations to evaluate the rate of biogenic silica accumulation on the Antarctic Continent Shelf. Silica is an important nutrient in the oceans and the NCSU research team will be evaluating the importance of Antarctic sediments in the global silica cycle.... At the 4th station, the corer encoun- tered a rock outcrop which sheared off half its base. The DCs meet the challenge and rebuilt the corer in a day and a half. 909c of our cores were collected with the rebuilt corer, and we thank the DCs and the crew of Glacier for their time and efforts. Dr. DeMaster.