The Protefs class could cover about 100 nautical miles submerged at five knots. Against the Mediterranean's strong currents, a boat might struggle to force the fastest flows or let a favorable current carry it while remaining underwater. The useful feature was the ability to reposition quietly across a meaningful distance, even at modest submerged speed. This performance adds an operating-geography dimension to a class otherwise remembered chiefly for its wartime losses and exile planning.
Notable Point · 1:11:46-1:12:31
Protefs-class submerged endurance in Mediterranean currents
A submerged endurance of about 100 nautical miles at five knots gave Greece's Protefs-class boats useful options for quiet movement with Mediterranean currents.