They put a different guidance package on those missiles that resolves
some of the issues with (re)using Tomahawk as an anti-ship missile.
Still has limitations (ships moving @ 30 knots can travel far when it takes a missile an hour to get there) but it puts a temporary tool back in place for US Navy ships that can't do what US Navy ships are supposed to do, reach out and break other ships. USN Cruisers and Destroyers have hardly any Anti-Surface Warfare capabilities today as they have focused on Air Defense and Land Attack for the past 20 years.
Good article on this missile:
http://www.informationdissemination....n-of-tasm.html
BTW - Want a good Woody - check out the videos on the Navy's railgun