High Quality Content by WIKIPEDIA articles! HMCS St. Croix (DDE 256) was a Restigouche-class destroyer that served in the Royal Canadian Navy (RCN) and later the Canadian Forces from 1958-1974. The fourth ship commissioned of a class of seven, St. Croix was laid down on 15 October 1954 at Marine Industries Ltd., Sorel and launched on 17 November 1956. She commissioned into the RCN on 4 October 1958 and thereafter carried pennant number 256 as a destroyer escort. She was the second ship named HMCS St. Croix to serve in the RCN.