The US Naval Institute Proceedings web page has a couple of Coast Guard related articles that did not appear in the print version of Proceedings,

• “The Polar Security Cutter’s Capabilities Must Match Its Name” by Lieutenant Commander Bill Rogers, U.S. Coast Guard (Retired)
• “Bring Back Coast Guard Sub Hunters” by David Van Dyk

I have reproduced my comments on these topics below.

In regard to arming the Polar Security Cutters (the author seemed fixated on cruise missiles. We did discuss this topic earlier here)

There are limits to what we want to put on ships bound for Antarctica, since they have to be open for inspection. On the other hand if we ever do have a near peer conflict involving the Arctic or Antarctic, these will become rare and essential naval auxiliaries. As such they will probably operate with other vessels, including more powerful warships if appropriate, but that does not mean they should not be able to defend themselves against the possibility of leakers. We need to make provision for last ditch defense with systems like SeaRAM.

Meanwhile the fact that they are law enforcement vessels means they should be able to forcibly stop any private or merchant vessel regardless of size. So far it seems they will have at most, 25mm Mk38 Mod3 guns.

The follow on Medium Icebreakers or Arctic Security Cutters, which are unlikely to go to Antarctica, are more likely to be more heavily armed from the start.

Coast Guard ASW (comments were generally surprisingly adverse):

It is a fact that in WWII most U-boats were sunk by aircraft, but about a third (about 230) were sunk by surface vessels, primarily those of our allies Britain and Canada.

Even when surface vessels did not sink U-boats, they often performed valuable service in blocking access to convoys and in rescuing mariners from sunken ships.

US Naval vessels only sank about 38 U-boats. Coast Guard cutters and Coast Guard manned Navy ships were involved in sinking a disproportionate number of those (ten) for various reasons. Most of the US Navy effort went into the Pacific and most of the USN effort in the Atlantic at least through mid-1943, was in escorting high speed troop convoys than largely avoided contact with U-boats.

Circumstances we will face in any near peer conflict may be very different.

The advantages provided by code breaking in WWII are unlikely.

The advantages provided by radar equipped aircraft detecting U-boats charging their batteries or transiting the Bay of Biscay on the surface during the night no longer exists.

The Chinese surface and air threat would divert the most capable USN assets from ASW tasks.

Unlike the Japanese during the Pacific campaign, the Chinese are likely to make a concerted effort to disrupt our logistics train.

We simply do not have enough ASW assets.

Augmenting Coast Guard cutters to allow them to provide ASW escort and rescue services for ships that are sunk by hostile subs, in lower threat areas, is a low cost mobilization option that can substantially increase the number of escorts at low cost.

This could be facilitated by augmenting cutter with USN Reserves. Navy reserve ASW helicopter squadrons could be assigned to fly from cutters.
LCS ASW modules could be placed on cutters and manned by reactivated Navy reservists with LCS ASW module experience.

Our few US merchant ships need to be protected and when inevitably, some are sunk, we need someone to rescue those mariners, because they have become a rare and precious commodity.

The crews of the Coast Guard Cutters Midgett (WMSL 757) and Kimball (WMSL 756) transit past Koko Head on Oahu, Hawaii, Aug. 16, 2019. The Kimball and Midgett are both homeported in Honolulu and two of the newest Coast Guard cutters to join the fleet. (U.S. Coast Guard photo by Petty Officer 3rd Class Matthew West/Released)

In answer to this comment from James M

Add : For (millions)

ASIST : 6.263
Mk 32 SVTT : 3.237
SLQ-25 Nixie: 1.727
AN/SRQ-4 LAMPS III: 4.625
VDS/MFTA combo: 14.802
ASW Combat Suite: 33.684
64.338 total. I am sure something could be arrived at for less. I look at this as what it takes to fit out an NSC the whole way. For one, OPC will never fit that VDS/MFTA on its stern. At best it would be a Nixie, maybe a container towed sonar we don’t yet use, and the mods for MH-60R. It would be good to know the plan for MUSV as it might help the equation. After all, the 64.338 would buy 2 MUSVs without payload. It could also buy an additional FRC.

So, we could equip ASW equip all eleven projected Bertholf class National Security Cutters (NSC) for less than the cost of a single frigate.

Why do you believe the VDS/MFTA would not fit on the Offshore Patrol Cutter? It is fully as large as the NSCs and does not have the boat launch ramp cut into the stern. They are also substantially larger than the LCSs.

OPC “Placemat”