USCGC Stone completes an Underway Replenishment.

The Navy League’s online magazine, Seapower, has a report on a recent Navy/Marine Composite Training Unit Exercise (COMPTUEX), “WASP ARG AND 24TH MEU COMPLETE JOINT FORCE’S MOST COMPLEX TRAINING,” that included an interesting note,

“U.S. Coast Guard Maritime Security Response Team (MSRT) East, USCGC Stone (WMSL 758), and USCGC Angela McShan (WPC 1135) participated in numerous events alongside the Navy and Marine Corps team to train and increase proficiency.”

I think this is a bit unusual, so it raised some questions in my mind. Training for doing LE boardings is normal and using a Coast Guard patrol craft to play an opposing force would not be that unusual, but the presence of USCGC Stone, a national security cutter (NSC), seems out of the ordinary. Is this just a one off or is there significance for Coast Guard Defense Readiness planning? Was this an experiment?

This particular COMTUEX was also otherwise unusual because an Amphibious Ready Group (ARG) does not normally have a destroyer attached.

So why would an NSC be involved? There are several possibilities, some mundane, some perhaps groundbreaking.

The post reports the training included, “events such as live-fire exercises, strait transits, maritime security exercises, amphibious landings, maritime interdiction, non-combatant evacuation operations, foreign humanitarian assistance, and counter-unmanned aerial systems (C-UAS) engagements.”

• We know Stone did an Underway Replenishment.
• There was an opportunity for formation steaming.
• It may have been an opportunity to do some cross deck helicopter operations.
• If Stone is to be included in the upcoming RIMPAC exercise (June and July), this would have been a good tune-up.

Now I will offer a couple of more imaginative, some will say imaginary, possibilities.

If an amphibious operation is conducted, Coast Guard units might provide SAR in case any of the landing craft are sunk. An NSC with Helicopter(s) would make a good SAR commander, while FRCs could follow the landing craft close into the beach, just as cutters did during the Normandy invasion.

Until recently, ARGs have generally operated without escort vessels. While operating off the hostile shore of a near peer adversary would probably require more than one AAW escort, there may have been a recognition that even during long transits from the West Coast, there may be a submarine threat.

The destroyer in this case, USS Cole (DDG 67), was a Burke class Flight I. When they were designed, they were expected to accompany aircraft carriers that had both fixed and rotary wing ASW aircraft in their air wing, so their design did not include helicopter hangars. The carrier based fixed wing aircraft are no longer active, and an ARG does not normally include ASW helicopters. Having seen National Security Cutters hosting Navy H-60s during the last two RIMPAC exercises, perhaps pairing an NSC with a Flight I Burke class DDG could provide a roost for ASW helicopters near the center of the formation while allowing the DDG greater flexibility in its positioning. The cutter could also function as plane guard, following the big deck amphib the way an escort is normally assigned to follow a carrier in case an aircraft goes into the water.

(During the Second Gulf War a WHEC assigned to a Carrier Strike Group functioned as plane guard and also provided a TACAN beacon because the one on the carrier was inoperative. All the other escorts had departed the scene to be in position to launch a Tomahawk missile strike.)