[BwanaNdege]

“The lake is connected with the Caribbean Sea by the navigable San Juan River , historically making the lakeside city of Granada, Nicaragua an Atlantic port.”

http://www.economicexpert.com/a/Lake:Nicaragua.html

[kenavi]

“The lake is connected with the Caribbean Sea by the navigable San Juan River , historically making the lakeside city of Granada, Nicaragua an Atlantic port.”

The River winds up at the Atlantic port of San Juan del Norte (10° 55′ 0″ N, 83° 42′ 0″ W), which in typical Nicaraguan fashion is south of the Pacific port of San Juan del Sur (11° 15′ 0″ N, 85° 52′ 0″ W).