MH-60 Sierra Seahawk conducts ordnance replenishment for USS George Washington in Pacific Ocean.

According to information published by the US DoD on September 19, 2024, an MH-60 Sierra Seahawk from Helicopter Sea Combat Squadron (HSC) 12 successfully conducted a vertical replenishment in the Pacific Ocean.
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MH-60 Sierra Seahawk and the aircraft carrier USS George Washington. (Picture source: US DoD)

The helicopter retrieved ordnance from the USNS Washington Chambers (T-AKE 11), a Lewis and Clark-class dry cargo and ammunition ship, and delivered it to the Nimitz-class aircraft carrier USS George Washington (CVN 73). This operation, while the carrier was underway, demonstrated the seamless logistical support between vessels, ensuring that the George Washington remains fully equipped for continued operations at sea.

In military operations, vertical replenishment (VERTREP) is an essential logistical method that allows naval forces to sustain prolonged deployments without returning to port or exposing vessels to potential threats by close contact.

VERTREP allows for swift resupply of essential supplies like munitions, fuel, or food, minimizing downtime. This method is particularly useful in contested regions or when adversaries are present, as it avoids the vulnerabilities of traditional replenishment-at-sea procedures where ships must come alongside one another.

About the helicopter

The MH-60S Seahawk, also known as the "Sierra," is a multi-mission helicopter designed for the U.S. Navy. Developed as part of the broader Sikorsky H-60 helicopter family, it entered service in 2002, initially replacing the CH-46 Sea Knight in vertical replenishment roles. However, its capabilities have expanded significantly, now covering missions such as combat support, anti-surface warfare, medevac, search and rescue, and airborne mine countermeasures.

The MH-60S shares a common cockpit with the MH-60R, allowing for easier pilot transitions between models. Powered by twin T700-GE-401C engines, it has a top speed of 180 knots and a range of 245 nautical miles. It also incorporates advanced avionics, including liquid crystal displays for both the pilot and co-pilot.

This platform has seen continuous upgrades throughout its service. The Navy is working on a mid-life update to improve its range, speed, and lift capacity, focusing on upgraded rotor blades and engine enhancements. The MH-60S reached full operational capability in 2016.