Trico Limited III, Houston, has applied to the Maritime Administration for a Title XI guarantee to aid in financing the construction of four tug/supply vessels intended for operation in the Gulf of Mexico. Eastern Marine, Inc., Panama City, Fla., is the proposed builder of the vessels, two of which are to be 180 feet in length, and two 166 feet. Delivery dates have not been established.

The requested guarantee is for $11,637,000, or 87½ percent of the vessels' estimated cost of $13,300,000.