Navy cargo ship completes acceptance trial The U.S. Navy's 14th and last Lewis and Clark class dry cargo/ammunition ship has completed its Integrated Acceptance Trial. SAN DIEGO, Oct. 4 (UPI) -- The U.S. Navy's 14th and last Lewis and Clark class dry cargo/ammunition ship has completed its Integrated Acceptance Trial. "Completing trials for the final ship in the Lewis and Clark class is a major milestone in this very impressive shipbuilding program," said Frank McCarthey, the Auxiliary Ships, Small Boats and Craft program manager for the Navy's Program Executive Office Ships. This ship trial again demonstrates the maturity of this class, the many lessons learned incorporated and significant production efficiencies NASSCO has achieved across the class. The future USNS Cesar Chavez, built by General Dynamics NASSCO is 689 feet long, 105.6 feet in the beam and has a speed of 20 knots. It can carry 780,000 cubic feet of cargo and 18,000 gallons of fuel. The Integrated Acceptance Trial conducted by the Navy took place over four days and was the last major marker before the ship's delivery to the service, which is scheduled for this year.