simrad nss7 structure scan difficulties

 Hi all im on a roadtrip from busselton to broome fishing as much of the coast as i can but im having problems with my structure scan dropping out it still shows water depth but nothing else just a blank screen with no source i have checked over and inoxed all the points and leads and everything looks ok but still no source anyone have any thoughts on what i am doing wrong or missing 

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 fig


Broady's picture

Posts: 131

Date Joined: 16/01/13

Its a bit hard to diagnose

Fri, 2015-05-29 09:00

Its a bit hard to diagnose from your brief note and I'm no structure scan expert. What depth are you using it in, has it worked before, is it dropping out at a certain speed, do you have the latest software updates, how/where is the transducer installed, have you checked cable condition??

I am assuming it has been working before, and given you've checked all of the connections it may have something to do with your zoom - start by putting all the settings back to auto then adjust from there, maybe you've zoomed in to look say out to 20m in 40m of water so all its picking up is water column?? May also be in your software setup.

Doubt this, but inevitably with a big trip a bit of extra gear is packed into the boat and you may have pinched or damaged the cable somewhere - a quick visual and feel will give you an idea.

Have never had much luck with structure scan in +20m.