Bertram31.com General Bulletin Board

Re: Radar Angle Question (help!)

Posted By: Vic Roy
Date: Wednesday, 13 April 2005, at 10:05 p.m.

In Response To: Radar Angle Question (help!) (Sean Burlingham)

Sean - this is a common worry, but mostly a non-issue. All modern radars have enough vertical tolerance (most about 20 degrees)in the transmit cone to take care of any reasonable bow up angle at cruise. There is no need to put a wedge under the antenna array. Now the bigger issue is not to place the antenna array too far back on a hardtop or half tower. Radar waves, being micro waves, are pure line of sight, so if at cruise with a bow up angle, the radar is looking at the front of the half tower, then your "in front" vision is going to be limited. Mount the array as far forward as you can on a hard top or half tower so it can "see" over the front of it. Once it's view is not obscured by the stuff right in front of it and on it's same horz. level, it will be able to "see" right in front of the boat.

My Raytheon 41X 48 mile antenna array is mounted on the very front of the half tower, and I can see a beer can floating 50' in front of the boat at cruise, and see the wake behind me, and the beer cans we toss over behind us too. We toss the beer cans so we can find our way home.

Just remember it's about a 20 degree cone, but you can't have anything blocking it close in, like the front of the the hardtop or tower.

UV

Messages In This Thread

Radar Angle Question (help!)
Sean Burlingham -- Wednesday, 13 April 2005, at 9:45 p.m.

Re: Radar Angle Question (help!)
Vic Roy -- Wednesday, 13 April 2005, at 10:05 p.m.

Thanks Uncle Vic
Sean Burlingham -- Thursday, 14 April 2005, at 5:08 p.m.