L-3 Unidyne Inc. has been tapped for work extending the service life of four air-cushioned landing craft based at Marine Corps Base Camp Pendleton. The U.S. Navy contract, announced June 16, is valued at $22.2 million.

The program will extend the service life of the landing craft from 20 to 30 years. Work includes replacing obsolete electronics, replacing the gas turbine engine and repairing corrosion damage, among other tasks, and will last through October 2016.

L-3 Unidyne is part of New York-based L-3 Communications Holdings Inc. (NYSE: LLL).

The Naval Sea Systems Command of Washington, D.C., awarded the contract.