Many OPVs belong to coast guards or police services, with the US Coast Guard given as an example. Bringing those ships into a wartime naval force requires coordination between departments that already use them. Paperwork and competing ownership can complicate a transfer. The original agency still needs to carry out its own patrol and enforcement duties, so taking its ship away also removes an asset from continuing work. Even after a transfer, the vessel's existing maritime-security design limits how quickly it can serve a combat role.
Notable Point · 35:35-36:45
Mobilizing patrol ships competes with their agencies' existing duties
A wartime transfer has to resolve departmental ownership and continuing enforcement work before a patrol ship becomes available to the navy.