Thousands of mostly African migrants embark on the dangerous journey from the shores of Libya and Egypt, often in small, inflatable boats, in search of a better life in Europe.
The boat sent out a rescue call last night but no rescue mission has been launched yet.
The two Russian ships were identified as the frigate Admiral Kasatonov and the tanker Akademik Pashin.
Sailor Elvis Francois survived on nothing but ketchup and spices while he was marooned in the Caribbean Sea for 24 days.
A US Department of Defense agency is developing a heavy-duty, fast-flying, low-altitude transport seaplane.