sentences:  The ASROC was rocket-propelled acoustically-guided Mk 44 torpedo that had a minimum range of and a maximum range of .The Destroyer Life Extension (DELEX) refit for the four surviving "Restigouche"s was announced in 1978.An effort by Maritime Command to update their existing stock of naval escorts, the DELEX program affected 16 ships in total and came in several different formats depending on the class of ship it was being applied to.