Radar question

matt_unique · Posted: Wed Sep 29, 2010 9:22 am Post subject: Nice!

Glad to hear it Mike!

Captains Cat · Posted: Wed Sep 29, 2010 9:25 am Post subject:

Yeah, me too. I've got the GPS above the Radar on a pedestal with an aluminum mast about 6" from the radome. Have not seen the problem. It's a 4KW Raymarine.

Charlie

tpbrady · Posted: Thu Sep 30, 2010 12:35 am Post subject:

I would say Lowrance/SimRad/et al needs to look at that closely. If a mast that close to the antenna generates that type of target, then there is a high probabilty that a real target to the left or right of the mast would me missed. There has to be some way to blank a one or two degree area of the radar equating to the width of the mast to eliminate that echo. Some installations may not have the ability to move the mast.

Beflyguy · Posted: Thu Sep 30, 2010 1:14 am Post subject:

thataway · Posted: Thu Sep 30, 2010 6:43 pm Post subject:

Interesting--since conventional wave guide radar would not have caused that interference--even aluminum masts don't on sailboats.

What I am concerned about in your set up, is that it looks as if the GPS antenna is both in the beam of the radar--and is being shadowed by the radar dome--the dome itself is not an issue, but the metal part of the rotating bar is. Lowrance (Navico?) products are very susceptable to radar waves, and many of them have burned out the antennas. I am not sure if Simrad is using the same antenna--but it is very possible. If the antenna is within several feet of the radar, or within a 30 degree beam of the radar, I would move it.