@ KATO & Sea Toby
Are any of these ships considered mine hunters? A Lerici class mine hunter has a range of 1,500 nautical miles (2,800 km; 1,700 mi) at 6 knots (11 km/h; 6.9 mph).
Arleigh Burke Flight III destroyers:
Displacement: 10,000 tons
Range: 4,400 nautical miles at 20 knots, 8,100km at 37km/h
Speed: 30+ knots
Cutters and OPVs have significant range, but don't have the armaments of a destroyer. Corvettes may have the armament of a destroyer but don't have the range.
Avenger class ocean going mine countermeasures ship:
Displacement: 1,312 tons
Range: not available on the web*
Speed: 14 knots
* to deploy to the Persian Gulf the Avengers were shipped, they didn't sail there from the US. Keep in mind its 8,505 flying miles from Corpus Christi, TX to Dubai, UAE. Shipping distances will be longer.
While the US Coast Guard may be happy with short range patrol boats, even their medium and long endurance cutters, OPVs, have long range of 8,000+ nautical miles at a economical speed of 12 knots or so. 3,000 or 4,000 nautical miles range at 12 knots is insufficient for US warships just to transfer from Norfolk to San Diego through the Panama Canal without refueling. It may be around 3,000 miles from Norfolk to San Diego by air or land, but its twice that distance by sea through the Panama Canal.
I wished I knew how to link a Google Earth satellite image of Dutch Harbor. Currently on Google Earth there is a Hamilton class cutter at Dutch Harbor. Dutch Harbor, Unalaska is 2,000 nautical miles in a straight line from Alameda, California, at Coast Guard Island where the west coast Hamiltons are home based.