C Maps inaccurate?

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I was prawning in the Saanich Inlet the last couple of days and was using my new Lowrance Elite FS. Not sure if I have done something wrong on my set up, but man my bottom readings were totally out to lunch with the bathymetric chart. I’m sure the sounder readings were correct because I verified them with my other sounder, but the chart contour lines were no where near accurate, at times 100 feet out! Anyone else find the bath

 

[Sharphooks]

I've navigated BC waters for almost two decades using C map (Furuno) and I've never found those types of discrepancies. Did you try resetting the zoom settings on the chart plotter?

I have had discrepancies with navionics, however--- I've seen misspelled Islands and reefs showing on the chart that were several 100 yd in a different direction. But i've never seen those type of discrepancies with C-map

 

[ziggy]

I've navigated BC waters for almost two decades using C map (Furuno) and I've never found those types of discrepancies. Did you try resetting the zoom settings on the chary plotter?

I have have had discrepancies with navionics, however--- I've seen misspelled Islands and reefs showing on the chart that were several 100 yd in a different direction. But i've never seen those type of discrepancies with C-map

The problem was with the contour lines, they were not even close. I think the positioning was OK and know the soundings were accurate, but when for instance I tried to follow a contour line on the chart it didn’t match the soundings. At one point the chart and actual sounding were about 100 ft out. I’ll see if I screwed up a setting, it’s a new toy!