ANTARCTICA- (Mar. 15, 2007)--Crewmembers from the Coast Guard Cutter Polar Sea advance on a simulated fire during a fire drill onboard. Weekly drills maintain a high readiness and insure the crew can quickly and safely respond to emergency situations. The Polar Sea is in Antarctica as part of Operation Deep Freeze 2007, clearing a navigable channel for supply ships to get needed goods and equipment to personnel working at McMurdo Station.