HM means "HELMINERON" or HELicopter MINE Countermeasures SqaudRON. HM-14 is out of Norfolk, VA, and HM-15 is out of CC, TX. HM-14 is not moving to TX. That gouge has been floating around for years, and there are absolutely no plans for it. 14 & 15 both fly the MH-53E. The FRS for the Navy 53's is in Norfolk, VA. The FRS is not a squadron, but uses 14's aircraft for the student pilots. If anyone is interested in Airborne Mine Countermeasures, look at www.amcm.org
HC-4 out of Sigonella also flies the MH-53E. Just a different primary mission area. It is a great bird. Flies very well, goes fast, and has a lot of legs (many many hours of gas).
53 guy