Complex sentence: She subsequently sailed on 1 July 1933 bound, via the Panama Canal Zone, for the West Coast; arriving at San Diego on 21 July, the ship plane-guarded for during the summer.
Split into simpler sentences: She subsequently sailed on 1 July 1933 bound, via the Panama Canal Zone, for the West Coast. Arriving at San Diego on 21 July, the ship plane-guarded for during the summer.