Seal (GP), Inc., Galveston, Texas, has applied to the Maritime Administration for a Title XI loan guarantee to aid in financing the construction of six diesel-powered tug/supply vessels. The applicant is a subsidiary of Seal Fleet, Inc.

The 2,500-bhp tug/supply vessels are expected to be employed in the U.S. Gulf of Mexico. Rysco Shipyard, Inc., Blountstown, Fla., will build two of the vessels. The four remaining vessels have not yet been contracted for, but all six are scheduled to be delivered before December 1982.

If approved, the Title XI guarantee would cover $18 million, or 75 percent of the vessels' combined $24-million estimated cost.