I have two computers and there is a difference in their depth readings. It appears to be a linear spread (deliberately not using the word error). In other words, the spread at 100' is double the spread at 50'. On the surface, they both read zero. The manufacturer specifications says accuracy is, "+/- 1% of full scale." Full scale is 399'. I'm not sure if they meant they can be off by 4' (okay, 3.99') at any point, but that is the way I read it. So at 100', an 8' spread could be in specs. I would have thought the spec would read, +/- 1% of depth. But, that is not my point.
They are the same make, but different models (probably the same hardware though), the same decompression model and database.
Where I see the greatest affect is the NDL bottom time calculation. I generally never push the NDL, so it isn't a factor in my diving. If I did, I would probably go with the shortest bottom time. Up to the time I got the second computer, I compared mine with my depth gauge and accepted the fact they were close, but never the same.
I was just wondering for those who have multiple computers, how close are the depth readings at depth?
For those with a single computer, have you compared it to your buddy's computer at depth? How close were they?
Hey, Seaduced, have you checked for that hidden "altitude" setting? I had to set mine to a known altitude, because it recognizes altitude as well as depth. However, that little footnote was like a single paragraph hidden in the book.