Dolphin from CGAS Detroit flying over Lake Michigan during the 2024 WaterStone Bank Air & Water Show at Milwaukee. The helicopter was upgraded to the 'E' variant with improved mission capabilities under Discrete Segment 6 through a Common Avionics Architecture System (CAAS) glass cockpit and digital weather radar. in Discrete Segment 8, a service life extension update through SLEP was done to five of its major structural components in the forward section.

CGAS Detroit was established in 1966 at Selfridge Air National Guard base, Michigan and initially flew three Sikorsky HH-52A Seaguard helicopters with an area of operations encompassing Lakes Ontario, Erie, St. Clair and southern Lake Huron. Since the retirement of the HH-52As in the 1980s, the unit has operated five MH-65D Dolphins. The Dolphin has gone through a series of upgrades since they were first assembled in Grande Prairie, TX, including a change of engines (from Lycoming LTS101-750B-2s to Safran Arriel 2C2-CGs turboshafts) and new navigation systems and "glass" cockpit displays.

Seen at Thunder over Michigan, 2011.