Capt , I have & 8-10' Galaxy Marine Antenna mounted on my roof , connect to & old Xtal style Motorola VHF Marie Radio , I monitor it all the time . I have in case of emergency in case my wife needs me & I'm out of Cell Range . Believe me it works ! The range I get being @ 679 ' OSL & over 35' to the tip is awesome ! Only needed it once & I was out there , I don't abuse it , but nice to have ! IMO ( I know how range is " Supposed to work " @ my height i think it makes a difference ???