Just a brief note on what is happening in the broader world of Naval warfare preparation. NavyRecognition provides conceptual drawings of topside launch tubes for the Long Range Anti-Ship Missile (LRASM).
Significantly the launchers for this much more capable missile are not expected to require any more space or support than the Harpoon missile and with upgrades it is expected to also incorporate a land attack capability.
As I have noted, the Coast Guard does not seem to have been considered in the Navy’s plans to increase “distributed lethality,” but should the need arise it looks like these would fit well between the Bridge and the 57mm on the National Security Cutters. We might also find a place for them on the Offshore Patrol Cutter. It should be possible to provide the supporting wiring, piping, control systems, etc. to support these relatively easily, even if the missiles and launchers themselves are not mounted, allowing rapid upgrade. (Cutters on Alaska Patrol have to be among the closest US units to Russian Pacific bases.)