This Atlantic made its first flight on 18 Apr'66 and was delivered as UC-315 to the Marineflieger (German Naval Aviation) on 29 June 1966. It was reserialled to 61-06. Out of the twenty Marineflieger Atlantics, five were converted during 1969 and 1970 into Signals Intelligence (SIGINT) aircraft, specialised in electronic reconnaissance of hostile radar systems and communications, 61-06 was one of those five. Under the code name of Peace Peek, the conversions were done by E-systems in the USA. They can easily be distinguished by their differing radome under the fuselage.