High Quality Content by WIKIPEDIA articles! USS Humboldt (AVP-21) was a United States Navy Barnegat-class small seaplane tender in commission from 1941 to 1947. She was briefly reclassified as a miscellaneous auxiliary and redesignated AG-121 during 1945. Humboldt (AVP-21) was laid down at the Boston Navy Yard in Boston, Massachusetts, on 6 September 1940. She was launched on 17 March 1941, sponsored by Mrs. William T. Tarrant, and commissioned on 7 October 1941 with Commander W. G. Tomkinson in command.

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