Depending on how many Argentinian players we have I would go with Eric's suggestion of Cape Finisterre or alternatively if there are more Argentine players than English speakers then maybe Cape St Vincent.
If Munrox is willing and has time to create new scenarios there's a series of battles fought between the British and French in the Indian ocean in the mid 18th century which I've found make very good tabletop wargames and would translate very easily to Velmad. Historical background is that between February 1782 and June 1783 the fleets of French captain Pierre Andre de Suffren de St. Tropez and British
Vice-Admiral Sir Edward Hughes fought a series of naval actions along the Indian Coromandel coast. Five actions, all largely inconclusive and fought between fleets that were relatively equal in numbers, were fought at Sadras, Providien, Cuddalore, Negapatam and Trincomalee. I have more details if needed.
