The United States Coast Guard (USCG) accepted delivery of its eighth HC-144B Ocean Sentry medium range surveillance aircraft outfitted with both the Ocean Sentry Refresh (OSR) modifications and the Minotaur mission system in late August.

The US Coast Guard transferred another upgraded HC-144B Ocean Sentry aircraft and its ninth HC-130J Super Hercules surveillance aircraft outfitted with the Minotaur Mission System into its fleet, the service said on March 13, 2019.