Check the gain specs. They all physically look the same. Shakespeare is the big dog. But an antenna is just a copper wire molded into fiberglass with some twists added.
At least 6dB in an eight footer( HI END hard top bouncing.. tough- Shakespeare Mariner 8900.. $ 240) . They make up to 9 db that's a 20' high antenna($700). An 8dB will be about 14' ($500). The little rubber ducky handheld VHF's on unity gain. Meaning NO signal boost at all.
As far as transmitting ... the higher the antenna is off the water the further it will transmit. The Rule of Thumb is that every foot higher is equivalent to 5 more watts of xmit power. SInce the radio is legally capped at 25 watts. All you have is height to play with.
Hope that helps? That would be a hot set up. When you hear radio calls that the boat 50' from you cant. You know you did very well selecting.
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Originally Posted by dfish28
Capt. Frank, So for a high gain antenna what would you recommend?
I was looking at the mariner 8900
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