Mounting of AIS GPS ANTENNA


kimberlite <kimberlite@...>
 

Bill,

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
mount the

AIS GPS antenna.

Fair Winds

Eric

Amel Super Maramu #376 Kimberlite





_____

From: amelyachtowners@...
[mailto:amelyachtowners@...] On Behalf Of Judy and Bill aboard
SV BeBe
Sent: Sunday, June 27, 2010 11:06 PM
To: amelyachtowners@...
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.

Bill
s/v BeBe, SM2k, #387


--- In amelyachtowners@...
<mailto:amelyachtowners%40yahoogroups.com> , kimberlite <kimberlite@...>
wrote:

Richard,

The antenna does not work under the dodger---my Garmin handheld does ---I
guess the acr unit is not as good. My thought of mounting it on the port
rail is that I fear interference with the Raymarine GPS antenna already
mounted there.

Fair Winds

Eric

Amel Super Maramu #376 Kimberlite





_____

From: amelyachtowners@...
<mailto:amelyachtowners%40yahoogroups.com>
[mailto:amelyachtowners@...
<mailto:amelyachtowners%40yahoogroups.com> ] On Behalf Of richard03801@...
Sent: Sunday, June 27, 2010 9:04 PM
To: amelyachtowners@...
<mailto:amelyachtowners%40yahoogroups.com>
Subject: Re: [Amel] Re: Mounting of AIS GPS ANTENNA





Eric have you thought about putting it on your port aft rail, or under the
dodger? We find that our secondary GPS a hand held works well using its
internal antenna as well as an external.
Your thoughts.
Richard SM209
Sent via BlackBerry by AT&T

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