In May 2013, Israel Shipyard unveiled a new ‘Mini Corvette’ design, the Sa'ar S-72 class; to offer the Israeli Navy a new class, which fits between the Navy’s existing Sa'ar 4.5-class missile boats, and Sa'ar 5-class corvettes. Through the years Israel Shipyards have built 40 Saar class missile boats; 20 were delivered to the Israeli Navy over the years. Last to be delivered were two upgraded Sa'ar 4.5 Hetz-subclass missile boats called INS Herev (2002) and INS Sufa (2003).