Commissioned on 15 April 1988 to SACLANT (Undersea Research Centre – SACLANTCEN, then named NATO Underwater Research Centre – NURC and now CMRE – Centre for Maritime Research and Experimentation ) of La Spezia , under Germany flag.
On 31 December 2015, the German flag was repatriated and Alliance was officially transferred under the Italian naval flag on 9 April 2016.
Alliance is manned and operated on behalf of NATO by the Marina Militare under a Memorandum of Understanding signed on 22 December 2015.
Since 23 December 2015 under Italian flag and than, since 31 March 2016, commissioned to Marina Militare