The USS Callao (IX-205) was an unclassified miscellaneous vessel built in 1943–44 by P. Smit, Jr. Shipyard in Rotterdam, Netherlands. Originally intended to be the trawler Mannheim for the Nordsee Deutsche Hochseefischerei, she was requisitioned by the Kriegsmarine and renamed Externsteine, serving as a weather observation ship and icebreaker. The vessel measured 183 feet (55.78 meters) in length, with a beam of 30 feet 10 inches (9.40 meters) and a draft of 13 feet 11 inches (4.24 meters). Displacing approximately 1,015 tons, she was powered by a 750 shaft horsepower triple expansion steam engine coupled with an exhaust turbine, driving a single screw propeller capable of reaching speeds up to 10 knots (19 km/h). Externsteine was deployed off Shannon Island, Greenland, as a weather station with a crew of nineteen sailors and eleven meteorologists, providing critical weather data for North Atlantic and European military operations. During October 1944, she was spotted and captured by the US Coast Guard Cutter Eastwind of the Greenland Patrol after being trapped in ice near Cape Borgen. The capture involved a military engagement in icy conditions—the first northernmost combat operation undertaken by U.S. forces during WWII. The Germans had placed scuttling charges on Externsteine, but these were disarmed, and the ship was taken as a prize, renamed East Breeze. Following her capture, she was brought to Boston, Massachusetts, and commissioned into the U.S. Navy in January 1945. The vessel underwent modifications at the Philadelphia Navy Yard for experimental purposes, conducting tests along the U.S. East Coast for five years. Decommissioned in May 1950, she was sold later that year and scrapped in 1951. The USS Callao, formerly Externsteine, holds maritime significance as the only enemy surface vessel captured by U.S. naval forces during WWII and was involved in the most northern combat operation of the war.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.