In US Naval Weapons, Friedman also mentions that during the 1970s, Tarpon was periodically considered as an ASROC replacement for surface ships. Since Harpoon could be fired from suitably modified ASROC launcher cells (beginning in 1976, the Knox class ASROC launchers were modified with two Harpoon-capable cells, for example), this would probably have been fairly straightforward. But the question becomes whether the ships could really detect subs reliably at 50-75 miles and whether they could localize targets at that range well enough to drop a lightweight torpedo within acquisition distance (especially without mid-course steering updates).