 Complete the following phrase:  Ten times, during the intervening 15 years, Shadwell cruised the middle sea and visited its ports of call. In 1959, Shadwell became the first helicopter-carrying dock landing ship She had her call letters changed from LSD to LPH when she carried helicopters . In 1961, she underwent a Fleet Rehabilitation and Modernization FRAM overhaul. She was in the Atlantic supporting the 