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Old 11-29-2017, 07:31 AM
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The old NSS8 was a pretty good unit. I think the sounder was its strong point. Once you put a 840xs next to a NSS8 I think you'll be wanting to swap the NSS8 for another 840XS. The 840xs is brighter, faster, has better charts, and a better sonar. If only one unit is in the budget then I think they could be complimentary. I would use the 840xs as the sonar. Both units will act as chartplotters. So when you want two screens use the nss as the gps and the 840 as the sonar. When coming and going (navigating) you can always use the better chartplotter on the 840.

What transducer do you have now?