BosstonesOwn
join:2002-12-15
Everett, MA
clubs:
 ·Comcast
| reply to DaDogs
Re: All well and good, but
Out of curiosity exactly how far can a vhf wave travel ? I just bought a new boat and it has a vhf radio with the gps beacon signal tied in. I am sort of curious of exactly how far that sucker can broadcast.
Ok back on topic after the answer 
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"It's always funny until someone gets hurt......and then it's absolutely friggin' hysterical!" |
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Pictor Guy
join:2004-06-21
Sammamish, WA
1 edit | said by BosstonesOwn  :Out of curiosity exactly how far can a vhf wave travel ? I just bought a new boat and it has a vhf radio with the gps beacon signal tied in. I am sort of curious of exactly how far that sucker can broadcast. Ok back on topic after the answer Based on my experience and what most people will tell you at the USPS or USCG it's about 15 miles ship to ship but can be as much as 50 miles if both antennas are high enough. See... »www.yachtcom.co.uk/comms/
But alot of it has to do with the height of the antenna and sea conditions (rolling the ship/antenna).
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Here's more from the USCG...
»www.navcen.uscg.gov/marcomms/boater.htm
"Your VHF radio is intended mainly for short range communications, generally 5-10 miles, and at least 20 miles to a USCG station. To communicate at longer ranges, you will normally need a satellite telephone or an MF/HF marine radiotelephone. Marine radiotelephone equipment normally operates between 2 - 26 MHz using single sideband emissions. MF/HF marine radiotelephones can also be used to receive high seas weather broadcasts, and by using a computer and a special interface provided by some coast stations, can provide Internet email." |
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DaDogs
Semper Vigilantis
Premium
join:2004-02-28
Deltaville, VA
| reply to BosstonesOwn
said by BosstonesOwn :Out of curiosity exactly how far can a vhf wave travel ? I just bought a new boat and it has a vhf radio with the gps beacon signal tied in. I am sort of curious of exactly how far that sucker can broadcast. Ok back on topic after the answer The reason they tell you the numbers they tell you is because planning must be absolute. If you want to calculate your range with VHF just figure the using this link:
»www.qsl.net/w4sat/horizon.htm
This as I said is because safety is an issue. The truth is your range will nearly always be greater than that returned by that calculator over water because ducting is very common over water. It is nearly always present.
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BosstonesOwn
join:2002-12-15
Everett, MA
clubs:
·Comcast
| said by DaDogs :said by BosstonesOwn :Out of curiosity exactly how far can a vhf wave travel ? I just bought a new boat and it has a vhf radio with the gps beacon signal tied in. I am sort of curious of exactly how far that sucker can broadcast. Ok back on topic after the answer The reason they tell you the numbers they tell you is because planning must be absolute. If you want to calculate your range with VHF just figure the using this link: » www.qsl.net/w4sat/horizon.htmThis as I said is because safety is an issue. The truth is your range will nearly always be greater than that returned by that calculator over water because ducting is very common over water. It is nearly always present. Neat they told us 7 miles max. From the high of the antenna to the water is 15 feet on #1 and 12 on #2 , really interesting I have never dealt with vhf before. I usually carry a sat phone from work. But it looks like im in the market for a nice vhf antenna that may be telescopic
You learn something new every day.
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"It's always funny until someone gets hurt......and then it's absolutely friggin' hysterical!" |
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