You have probably heard that Four Russian naval vessels based in the Caspian Sea have launched 26 missiles against targets in Syria. This attack demonstrates a capability similar to that of the US Tomahawk missile.
What you might not realize is how small the Russians ships that launched the attack really were. While the US surface vessels equipped with Tomahawk are Burke class destroyers and Ticonderoga class cruisers of 8,000 to 10,000 tons, the Russian operation involved only a one small frigate and three small corvettes. The corvettes were smaller than a 210, and the frigate was less than two thirds the size of a 378. All four were considerably smaller than the projected Offshore Patrol Cutter. All four together displace only slightly more than a single Bertholf class.
The largest ship, Dagestan, is a Gepard class light frigate or large corvette, 1,930 tons (full load), 102.14 m (335.1 ft) in length overall, 13.09 m (42.9 ft) of beam, with eight Kalibr (SS-N-27) anti-surface missiles, SA-N-4 AAW missiles, a 76.2 mm gun, two six barreled 30 mm guns, four 533 mm (21″) heavy weight torpedo tubes, and an RBU-6000 ASW rocket launcher.
The other three, Grad Sviyazhsk, Uglich, Veliky Ustyug, were Buyan-M class corvettes, displacing 950 tons full load, with a maximum speed of 25 knots, armed with Kalibr (SS-N-27) anti-surface missiles, 100-mm and 30-mm guns, and Igla-1M air defense missiles.
While the US Navy has begun talking about distributed lethality, the Russians are practicing it.
Certainly the Coast Guard is not going to arm their ships like this in peacetime, but we might want to keep the possibility in mind if things start to go south.