Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 22-07-2014, 16:49   #1
Registered User

Join Date: Jan 2008
Location: Berkeley, CA
Boat: Hylas 47
Posts: 65
Simrad 4G radar with Scanstrut Backstay Mount

I have a Simrad NSS system with a 4G radar that is mounted using the Scanstrut self-leveling backstay rig. While this mounting system was certainly pricey, it seemed like the best way to go at the time. However I seem to have an issue that might be related to this.

I will often get a "ghost image" at a 0 degree bearing at a similar distance to another real object that is generally located within 30 degrees of the centerline. So if there is an object (boat, buoy etc) 1.5 miles out at 25 degrees from the bow, The radar will often show another blip on the centerline at 1.5 miles out. As you can imagine, this would certainly be an issue worrying about dodging an object in thick fog that does not exist.

I have played around with the standard tuning controls, including the "local interference" filter without much success at getting rid of this problem. If I strongly crank up the filtering, or down the gain, I can get rid of it but also lose other real targets in the process.

Since the mount is the style that supports the dome behind the backstay, there is a stainless tube a bit over an inch in diameter going right in front of the dome. I have to wonder if this is the cause of the problem. Anybody else with the same radar and mount? If this tube is the issue, any thoughts on if there is some treatment I could do to it to lessen this phenomena?

Other than this concerning problem, I really like this whole system.

Greg Davids
__________________
gdavids is offline   Reply With Quote
Old 22-07-2014, 16:54   #2
Sponsoring Vendor
 
Neptune's Gear's Avatar

Community Sponsor

Join Date: Oct 2012
Location: Gulf Harbour, New Zealand
Boat: Farr Phase 4, 12.8m
Posts: 992
Re: Simrad 4G radar with Scanstrut Backstay Mount

I have a 3g Unit on a custom made backstay mount. It has 2 stainless tubes at about 30 deg angles - no similar issues as you report. Mount is behind the backstay in a similar manner to yours.....
__________________
Matt Paulin
Neptunes Gear Ltd
www.neptunes-gear.com
Neptune's Gear is offline   Reply With Quote
Reply

Tags
radar, simrad

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Simrad NSS7 and Simrad 3G radar gunkylump Marine Electronics 6 26-04-2015 13:15
For Sale: Questus Backstay Radar Mount Undine Classifieds Archive 3 01-12-2012 10:18
Scanstrut Backstay Forward Radar Mount gunkylump Marine Electronics 6 30-10-2012 07:14
Scanstrut Backstay Forward Radar Mount gunkylump General Sailing Forum 0 23-10-2012 10:09
For Sale: Scanstrut Radar Mount Sirocco Classifieds Archive 3 24-10-2011 12:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:23.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.