Complex sentence: The first rescue resources to approach the crash site were Canadian Coast Guard Auxiliary volunteer units, these units were mostly privately owned fishing boats, that departed from Peggy's Cove, Bayswater, and other harbors on St. Margaret's Bay and the Aspotogan Peninsula.
Split into simpler sentences: The first rescue resources to approach the crash site were Canadian Coast Guard Auxiliary volunteer units. These units were mostly privately owned fishing boats that departed from Peggy's Cove, Bayswater, and other harbors on St. Margaret's Bay and the Aspotogan Peninsula.