@C the sigma is just my current flavor of the month ship. practical and efficient and uses modern technology nothing "transformative" or "revolutionary" which is why i like it.
The SIGMA is a good design, but it also depends what type off mission the USCG want it for. if it is for offshore duty, and must be capable to handle the worst weather condition out there the Ulstein-design X-bow have a big advantage.
There is reason for why Norway use offshore vessel design philosofy in their coast guard vessel (good weather boat, good cargo capability, big tanks for oil-spill,towing capacity) (That's Norway) But what USCG realy want is the big question.