The Coastal Patrol Vessel HS GALANIS, with hull number R-198, is the second Island-class vessel transferred to the Hellenic Navy from the United States Coast Guard. She was commissioned into the U.S. Coast Guard as USS ADAK (WPB-1333) on August 18, 1989, in New Jersey, and was decommissioned on June 30, 2021, in Manama, Bahrain, after nearly 32 years of service. Her design and construction were focused on achieving the maximum possible durability and high speed. The vessel is made of steel, while her superstructure is aluminum, with a total displacement of approximately 170 tons. Propulsion is provided by two PAXMAN VALENTA V16 16RP200M engines, enabling her  to reach a maximum speed of over 30 knots.

From August 18, 1989, until June 30, 2021, when she was decommissioned as part of the replacement of Island-class patrol vessels, she participated in and led numerous and diverse operations. Perhaps most notably, she undertook command duties in coordinating the response to the September 11 attacks in New York.

USS ADAK (WPB-1333) arrived at Salamis Naval Base on Tuesday, July 4, 2023, and was given her current name in accordance with Decision No. 69 of the 24th plenary session of the Supreme Naval Council on Monday, July 3, 2023. She was named after Petty Officer Second Class Georgios Galanis, son of Stylianos (service number 10839), and received the distinctive number R-198.

A wide range of modernization works was carried out on HS GALANIS, including upgrades to electronic and communication systems, as well as extensive repairs to propulsion and electrical systems at SALAMIS SHIPYARDS, until October 11, 2024, when she returned to Salamis Naval Base.

On September 30, 2024, the vessel’s integration into Hellenic Navy was signed by the Minister of National Defence, Mr. Nikolaos-Georgios Dendias, and the official flag-raising ceremony took place on January 20, 2025.

HS GALANIS was named after Petty Officer Second Class Georgios Galanis, son of Stylianos (10839), who was born in Plomari, Lesvos, in 1915. He was killed on October 22, 1943, when Destroyer ADRIAS, operating in the Dodecanese near Kalymnos, struck a mine, causing the bow to be blown off. As a Petty Officer Second Class and crew member of HS ADRIAS, he demonstrated self-sacrifice during engagements with enemy torpedo boats and was the most senior non-commissioned officer killed in the incident.

He was awarded the Medal for Exceptional Acts “for the exceptional conduct and heroism he displayed during the engagement of the destroyer ADRIAS with enemy torpedo boats on the night of July 20–21, 1942.” He was posthumously promoted for gallantry to Senior Chief Petty Officer, “having been killed in the explosion caused by the destroyer ADRIAS striking a mine on October 21, 1943.”