Mary A. Whalen (tanker)

Mary A. Whalen, also known as the S.T. Kiddoo, is a historic oil tanker located in the Red Hook neighborhood of Brooklyn, Kings County, New York. She was built in 1938 by the John J. Mathis Company of Camden, New Jersey and measures 138 feet long. She is a rare example of a "bell boat." The tanker shipped oil along East Coast and was at center of United States v. Reliable Transfer Co., a seminal decision in maritime law after she ran aground in Rockaway Inlet in 1968. She was in active service until 1994.

She was listed on the National Register of Historic Places in 2012.