Should the Littoral Combat Ship be understood as the US Navy's offshore patrol vessel?
Short answerNo; the US Coast Guard covers the OPV-style mission, while LCS was intended as a Navy combatant for different tasks.
NotesAmerican offshore-patrol duties are assigned to the Coast Guard in this comparison. That division of responsibilities changes what the US Navy needs to procure for itself. Another navy's OPV can therefore represent work handled by a separate American service. This institutional difference is the reason given for rejecting a straightforward LCS-to-OPV comparison.