Final step before fleet entry

Sea trials are conducted under shipbuilder control, not Navy command, as part of the pre-delivery process. The goal is to verify whether the ship meets operational standards required for acceptance. The USS Patrick Gallagher is the last Flight IIA Technology Insertion variant, built to sustain fleet numbers while newer designs enter production.

The destroyer carries the proven Aegis combat system and maintains compatibility with existing fleet operations. Additionally, it has 96 vertical launch system cells, which provide powerful missile capabilities for strike, anti-submarine, and air defense operations. As the Navy gets ready to improve radar and power systems on its next ships, this continuity is crucial.

Testing propulsion and ship handling

Trials focus on propulsion, maneuverability, endurance, and system integration. The ship is powered by four General Electric LM2500 gas turbines that generate about 100,000 shaft horsepower. These engines are expected to push the vessel to speeds of 30 to 31 knots (about 35 to 36 miles per hour).

Engineers conduct multiple speed runs at different power levels while recording performance data. Maneuverability tests measure turning response and stability during course changes. Emergency stopping trials evaluate how quickly the ship can halt by reversing propulsion from full speed ahead.

Endurance testing monitors fuel consumption, cooling system behavior, and exhaust conditions during extended operation. Runs are made in opposing directions to lessen the effects of wind and currents. GPS tracking and onboard equipment are used to collect data for accurate comparison with Navy requirements.

Systems checked under real conditions

Unlike equipment testing in isolation, sea trials involve observing the performance of equipment when functioning as a unit. Power distribution is observed during propulsion operations, with auxiliary machinery and onboard systems running simultaneously. This ensures stable power delivery across the ship.

The mechanical parts, piping system, and ventilation system are turned on one after another, then tested. The engineers keep increasing the load to determine their limitations. Hazardous tests, such as maximum-power runs, are conducted under strict supervision.

Members of the crew performing these tests include staff from Bath Iron Works, including mechanics and system operators. This crew follows standard procedures that define the sequence of operations and the necessary safety measures to be taken. Combat systems are not fully exercised at this stage, as the focus remains on engineering performance and seaworthiness.

A namesake with a legacy

The ship pays tribute to Patrick Gallagher, a Marine Corps corporal who fought in Vietnam. Born in Ireland in 1944, Gallagher moved to America in 1962 and joined the corps two years later.

On July 18, 1966, he intervened to shield fellow Marines from incoming grenades during a night battle near Cam Lo. He prevented casualties by removing one and shielding another. He was awarded the Navy Cross for these deeds. At the age of 23, Gallagher was killed in battle on March 30, 1967.

The destroyer bearing his name measures about 513 feet in length with a beam of 66 feet and a displacement of about 9,200 tons. It can carry a crew of around 380 sailors. Armament includes a 5-inch naval gun, close-in defense systems, torpedo launchers, and support for two MH-60R helicopters.