Cengiz Topel Naval Air Station , aka Topel Airport or formerly Cengiz Topel Air Base, is a Turkish Navy air station located east of Izmit in Kocaeli Province, Turkey. The airport is in joint use for military and civil. Restructured in 1976, it hosts the Turkish Naval Aviation Command with two flying units, the 301st Squadron of fixed-wing aircraft and the 351st Squadron of rotorcrafts.