The RV Sproul was constructed in Bayou La Batre, Alabama by Steiner Fabricators in 1981 under the name of Midnight Alaskan.[2] It was built using a modified gulf coast design for use by oil rig companies.
Acquisition by Scripps
The vessel was purchased by Scripps director William Nierenberg on July 27, 1984, as a replacement for the outgoing RV E. B. Scripps.[4] She was purchased from the chartering firm Midnight Boats, based in Louisiana, with SIO using the marine broker company Marcon International, Inc.[5] After being purchased, she was renamed after Robert Gordon Sproul and underwent a number of modifications for increased scientific research along the Coast of California and Gulf of California.
She departed Louisiana in August and embarked on her first scientific cruise to study seals near the Yucatán Peninsula, then traveling through the Panama Canal and docking in San Diego in October 1984.[4]
In 1991, then-captain Louis Zimm estimated the ship to be valuated at $3 million.[6]
Between September 2014 and December 2015, Sproul completed all operations using 100% biofuel.[7]