I get the reasoning, I just don't understand the logistics. France and Spain did still have some remnants of a navy, but wasn't most of it blockaded in port, not running free? I presume Britain was keeping tabs on the F/S fleets, and would intercept if necessary. I'm not disagreeing with you, but if Portugal had any fleet at all, they should be capable of protecting the royals. So it seems to me either Portugal's navy isn't all that much, or the oft claimed demise of F/S navies is overly exaggerated.