On Jun 7, 12:38 pm, Chuck wrote:
Ed wrote:
Makes me wonder how high "Sea tow" in southflorida has their antennas. I
regularly talk to them from Bimini (40 NM from Miami) and Freeport (55NM
from WPB) for radio checks.

I have a 21' 9db 9 ft off the water (30' tall)
sqrt of 30 = 5.5 NM (My boat) That translates to 2500 ft... .Hmmmm
not possible.

Never really thought of it before but I bet they must have repeaters in
the islands.

Hi Ed,

The Sea Smart network uses 300' - 400'
towers in a radio-over-internet system.
I don't know if they have transmitters
on the islands, but if so, they are
probably linked by internet rather than
radio. The website mentions only US
coastal areas as their service territory.

http://www.seasmartvhf.com/pressroom...nes020606.html
Welcome to Sea Smart - "Who knew your
VHF was so powerful?"

Chuck

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VHF radios are meant to have a range of about 80 miles. Radio waves
travel really well over the water and there is very little loss over
long distances. I would try VHF first before investing in SSB or HF.