So, I just installed a new SH 1600 VHF and Shakespeare Galaxy 5225 XT antenna on the boat and was having trouble (or I think so) with talking to other boaters at a distance. Antenna is mounting on the roof. A friend of mine was only a few miles away before I could finally talk to him. I have the new connector installed properly and soldered the end good. What kind of distance should a VHF radio get out on the open water?