For those that might like some illustrations to clarify the the acronyms that are being used to describe various ways ships are being powered now, I found a pdf “Naval Shipbuilding, Current Developmental Trends with Combatants and Combat Support Ships,” that shows layouts for six of them:

• CODAD (Combined Diesel and Diesel)
• CODOG (Combined Diesel or Gas Turbine)
• CODAG (Combined Diesel and Gas Turbine)
• CODAG-WARP (Combined Diesel and Gas
Turbine — Waterjet and Refined Propeller)
• CODELAG (Combined Diesel Electric and
Gas Turbine)
• AE (All Electric).

It goes on to talk about hull forms, alternatives to conventional propellers, construction materials and modularity.

Beginning on the about fourth page (of nine, marked as page 29) it becomes a sales pitch for two concepts that were being promoted by Blohm and Voss. One of them, the MEKO CSL (combat ship, littoral). might be of some interest in that it is not too far from the specs for the Offshore Patrol Cutter, except that it appears too compromised toward higher speed and does not look like it has either the endurance or the seakeeping that would make a good cutter.