Abandoned Ship found (requires a ship to have gone missing in that area lately) - 25% percent health ship is found unattended and joins your fleet.Odd creature captured by the crew - A deep sea creature is speared and hauled overboard, the men leer at it and are changed by the experience = 5 naval tradition.Shipwrecked Sailors - Frightened men hanging to driftwood are pulled ashore with tales or traumatized = 100 men to naval force limit.Positive Events for fleets smaller than 10 The Devil's sea particular has a lot of historical significance for Japan, as a entire Mongolian invasion fleet ended up being lost there in effect saving the country. Off the east seas of Rio de Janeiro (this ones more broad but lands within that area).Wharton Basin (contempoary name, lies in the Indian ocean on the approach towards Western Australia).Devil or Dragon's Sea (Pacific, Between Japan and the Phillipines - this one has a historical expanded history too).Bermuda & The Bermuda Triangle (Atlantic).Hotspots to mention (excluding land based ones) Sanderson that areas of magnetism (not really tangible to a historical point of view) in world locations tend to create dangerous areas upon the seas renown for dissapearances or strange occurances.

The outlying concept is that contrast to real Vortices which is a concept proposed by Ivan T. This initially is a strange concept but i think it would fit in fine as a free patch content for DLC, when with the El-Dorado DLC's exploration mechanic that occasion when you are exploring those sea zones, or on a low percentage chance when a fleet smaller than (10) passes through.

Vile vortices