Coast Guard Cutter Harriet Lane departs Coast Guard Yard in Baltimore Aug. 3, 2023, after undergoing 15 months of In-Service Vessel Sustainment Program production work. The service life extension program for this cutter entailed 113 work items, worth $21 million, which included a new electrical system and an MK38 Mod 3 gun weapon system, a first for the medium endurance cutter class. Both Coast Guard Cutters Seneca and Harriet Lane served as medium endurance cutter prototypes for new electrical and structural work and Harriet Lane served as the gun weapons systems prototype.
For more information: In-Service Vessel Sustainment Program page
Above is an announcement by the Acquisitions Directorate (CG-9). As I noted in a July post about the WMEC270 Service Life Extension program, there are still some unknowns regarding the program. The photo above may answer some of those questions.
As expected, a Mk38 gun mount has replaced the 76mm Mk75. The CG-9 post indicates the installed mount is the 25mm Mk38 Mod3, and that there is one and only one mount. The Mk92 fire control system has apparently been removed and I see no apparent new radar that would replace its air search and approach control capability. It also appears the SLQ-32 has been removed.
It appears the Mk38 Mod3 is mounted on an elevated platform about four feet above the foc’sle deck. This should provide both a better field of fire and a degree of protection from green water coming over the bow, though I felt it should have been raised a full deck.
Harriet Lane was a prototype, but it wasn’t one of the six to get the complete SLEP. They are to be Spencer, Legare, Campbell, Forward, Escanaba and Tahoma.
Harriet Lane is expected to change homeports to the Pacific and be dedicated to operations in the Western Pacific.
I think it perhaps unfortunate, that the ship that may be placed in a position where it will need to face down China Coast Guard cutters armed with 76mm guns has lost hers. Perhaps it should not matter, but it may be more difficult to act boldly when your adversary can hurt you badly, from a distance, with impunity.










