“The latest hot rumor is that the Navy and ABS have come to a parting of the ways with regard to the Naval Vessel Rules. They are no more. Gone. Finished. Kaput. I can hear sighs of relief nationwide. And the Navy’s ships will be less expensive. But note that this decision does not include the Coast Guard, the one Government agency that should not need anyone else to write its rules.“
The specifications for the Offshore Patrol Cutters (OPC) require that they be built to a Coast Guard modified version of these rules. I believe the Littoral Combat Ships were also required to comply with the ABS NavRules.