Part of the lagoon, small islands, and connecting reefs of Eniwetok.  VMB-613 frequently operated from Eniwetok as it was closer to Ponape.  Additionally, VMB-613 flew sector searches from Eniwetok as well as Hunter-Killer missions to ensure the shipping routes were free from Japanese submarines. 

Photograph: Marine Bombing Squadron Six-Thirteen (via William A. Kehr)