Clearance diver’s unique, and cold, deployment
[caption id="attachment_22903" align="aligncenter" width="593"] Photo by Sgt Sam Ladd, US Army[/caption]Antarctica is the coldest of the Earth’s continents, which might explain the name of a recent US-led mission entitled Operation Deep Freeze. From December to February, United States Coast Guard Cutter Polar Star, a heavy icebreaker, made its 23rd deployment on the annual joint U.S. military service mission to resupply the U.S. Antarctic stations in support of the National Science Foundation, the lead agency for the U.S. Antarctic Program.Joining the United States Coast Guard dive team was LS Jeff Dubinsky, a Fleet Diving Unit (Pacific) clearance diver. The 122 metre, 13,000-ton Polar Star produced a 37-kilometre channel through the one to four-metre-thick ice to McMurdo Station. The three-week process to cut the ice enabled the offload of over 19.5 million pounds of dry cargo and 7.6 million gallons of fuel from three merchant vessels. All three ships combined offloaded enough supplies to ensure the research station has provisions until 2021. Supplies are critical for the science station’s daily operations and are integral to the National Science Foundation’s massive overhaul of McMurdo Station. It is in the midst of a $355 million construction project to remove 104 buildings around the research station and create a central hub of six main structures. The structures will contain science labs, operations offices, and accommodations for the station. Construction is scheduled to finish in 2026. As a member of the dive team, LS Dubinsky integrated with the United States Coast Guard and U.S. Army Dive teams in Honolulu, Hawaii, for a workup dive, ice dive theory training, and embarkation on Polar Star. The ship transit from Hawaii to Antarctica took a month with a port call in Hobart, Tasmania. Upon arrival on the continent, the ship was greeted by large ice flows, 24-hour sunlight, and pods of killer whales following the ship. The dive team provided the icebreaker an emergency diving and underwater repair capability. During the 42 days at sea, between Hobart and the port visit...































