I already have the antenna mounted on the top of the mizzen. Coming home
this week from St Marti to NY I received targets over 120 miles away from a
640 foot tanker. Remember that out in the ocean most of the Ais traffic if
from big ships with high antennas. It has worked with two different AIS
receivers very well for 3 years. That IS NOT my problem. I need a place to
AIS GPS antenna.
Amel Super Maramu #376 Kimberlite
[mailto:amelyachtowners@...] On Behalf Of Judy and Bill aboard
Sent: Sunday, June 27, 2010 11:06 PM
Subject: [Amel] Re: Mounting of AIS GPS ANTENNA
Eric & Richard,
VHF is line of sight and rarely bounces. Mounting at the top of the main
mast gives you around 10 miles further reach than mounting on a rail. The
"range gained" formula is: 1.17 times the square root of the additional
height in feet = additional range in nautical miles. The horizon while
standing on the deck is 3.5 miles...from the top of the mast it is 10 miles.
If you want to maximize being seen and seeing others, go up.
GPS does not need height and will work OK under a dodger.
s/v BeBe, SM2k, #387
--- In amelyachtowners@...
<mailto:amelyachtowners%40yahoogroups.com> , kimberlite <kimberlite@...>
[mailto:amelyachtowners@...<mailto:amelyachtowners%40yahoogroups.com> ] On Behalf Of richard03801@...
Sent: Sunday, June 27, 2010 9:04 PM<mailto:amelyachtowners%40yahoogroups.com>
Subject: Re: [Amel] Re: Mounting of AIS GPS ANTENNA