USS Callao (IX-205), an unclassified miscellaneous vessel

Unclassified miscellaneous vessel

The IX hull classification symbol is used for ships of the United States Navy that do not fit into one of the standard categories...

, was the third ship of the United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 to be named for Callao

Callao

Callao is the largest and most important port in Peru. The city is coterminous with the Constitutional Province of Callao, the only province of the Callao Region. Callao is located west of Lima, the country's capital, and is part of the Lima Metropolitan Area, a large metropolis that holds almost...

, a seaport in Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

. She was built in 1943 and 1944 by P. Smit, Jr. Shipyard, in Rotterdam

Rotterdam

Rotterdam is the second-largest city in the Netherlands and one of the largest ports in the world. Starting as a dam on the Rotte river, Rotterdam has grown into a major international commercial centre...

, Holland, as Externsteine for the Kriegsmarine

Kriegsmarine

The Kriegsmarine was the name of the German Navy during the Nazi regime . It superseded the Kaiserliche Marine of World War I and the post-war Reichsmarine. The Kriegsmarine was one of three official branches of the Wehrmacht, the unified armed forces of Nazi Germany.The Kriegsmarine grew rapidly...

. The ship was originally named for the unusual Externsteine

Externsteine

The Externsteine are a distinctive rock formation located in Ostwestfalen-Lippe of northwestern Germany, not far from the city of Detmold at Horn-Bad Meinberg. The formation is a tor consisting of several tall, narrow columns of rock which rise abruptly from the surrounding wooded hills...

 rock formation investigated by Heinrich Himmler

Heinrich Himmler

Heinrich Luitpold Himmler was Reichsführer of the SS, a military commander, and a leading member of the Nazi Party. As Chief of the German Police and the Minister of the Interior from 1943, Himmler oversaw all internal and external police and security forces, including the Gestapo...

 for evidence of cultural significance to early Teutonic folklore and history. Externsteine was employed as a weather observation ship off Shannon Island on the northeast coast of Greenland

Greenland

Greenland is an autonomous country within the Kingdom of Denmark, located between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe for...

 to aid forecasting of storm events tactically significant to North Atlantic and European combat operations, but was captured on the night of 15 October–16 October 1944 by USCGC Eastwind

USCGC Eastwind (WAGB-279)

USCGC Eastwind was a United States Coast Guard Wind-class icebreaker.She was laid down in 1942 and launched in 1944. Eastwind ferried 200 US army troops which captured the last German weather station in Greenland, Edelweiss II, on 4 October 1944. She also seized the German trawler Externsteine,...

.

Patrolling aircraft spotted Externsteine camouflaged in a field of unconsolidated pack ice. The Coast Guard icebreaker opened a lead through the ice under cover of darkness. At a range of 4000 yards, the icebreaker fired three salvos from its 5"/38 guns (one short, one over and one across the bow) before closing to hailing range and demanding surrender. At the time, it was the northernmost combat operation ever undertaken by United States forces.

The United States Coast Guard

United States Coast Guard

The United States Coast Guard is a branch of the United States Armed Forces and one of the seven U.S. uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the military branches for having a maritime law enforcement mission and a federal regulatory agency...

 prize crew brought her into Boston, Massachusetts, by way of Reykjavík

Reykjavík

Reykjavík is the capital and largest city in Iceland.Its latitude at 64°08' N makes it the world's northernmost capital of a sovereign state. It is located in southwestern Iceland, on the southern shore of Faxaflói Bay...

 and NS Argentia

Naval Station Argentia

Naval Station Argentia is a former base of the United States Navy that operated from 1941-1994. It was established in the community of Argentia in what was then the Dominion of Newfoundland, which later became the tenth Canadian province .-Construction:Established under the British-U.S...

, Newfoundland

Dominion of Newfoundland

The Dominion of Newfoundland was a British Dominion from 1907 to 1949 . The Dominion of Newfoundland was situated in northeastern North America along the Atlantic coast and comprised the island of Newfoundland and Labrador on the continental mainland...

. There she was commissioned

Ship commissioning

Ship commissioning is the act or ceremony of placing a ship in active service, and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to the placing of a warship in active duty with its country's military...

 into the United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 on 24 January 1945 with Lieutenant D. O. Newton, USNR, in command.

Between 30 January 1945 and 4 February she was outfitted at Philadelphia Navy Yard for special experimental work for the Bureau of Ships

Bureau of Ships

The United States Navy's Bureau of Ships was established by Congress on June 20, 1940, by a law which consolidated the functions of the Bureau of Construction and Repair and the Bureau of Engineering. The new Bureau was to be headed by a Chief and Deputy-Chief, one selected from the engineering...

, and for the next five years carried out tests in the area of Cape May, New Jersey

Cape May, New Jersey

Cape May is a city at the southern tip of Cape May Peninsula in Cape May County, New Jersey, where the Delaware Bay meets the Atlantic Ocean and is one of the country's oldest vacation resort destinations. It is part of the Ocean City Metropolitan Statistical Area. As of the 2010 United States...

, and Cape Henlopen, Delaware. She was decommissioned

Ship decommissioning

To decommission a ship is to terminate her career in service in the armed forces of her nation. A somber occasion, it has little of the elaborate ceremony of ship commissioning, but carries significant tradition....

on 10 May 1950, and sold 30 September 1950.