I summary: My question is "Is the Fast Ascent rate a bit too sensitive making it quite a useless indicator?"
The detail follows:
I've seen the thread from 2007 where someone complained that they've had their Nemo complain about Fast Ascent on every dive.
Me too: Mine's logged 143 dives and apart from some very shallow things for example:
max depth 2.5m : 10m/min max ascent rate
max depth 3.8m : 9m/min max ascent rate
every dive shows a "Slow" meaning I've gone up too fast (equal or more than 12m/min)
The fact is: When ascending I'm watching it like a hawk and keeping it <9m/min consistently.
So it's totally demoralising when looking at my dive profile during the surface interval over a coffee and I see "Fast Ascent" every single time.
It appears that it complains when I raise my arm to take a look at it - I used to wear it on my left wrist but it alarmed when I raised my left arm to dump air from the dry suit; Now I wear it on the right wrist but still I reckon it alerts if I do a "normal" thing during a dive (e.g. go vertical to look at something on a wall; or go over a rock that's 1m up, or raise my wrist to look at the dive computer)
I used to be quite a paranoid "Is it me?" to the extent that I'd enter the dive log into a spreadsheet (20 second increments on the Nemo Wide) and work out my ascent rate, and be satisfied that it was around <5m/min over consecutive 20 second intervals (take the difference between two depths 20 seconds apart, and multiply that by 3 to get m/min)
My question is: isn't this a bit too sensitive? Shouldn't it have some tolerance? It would appear that it's *impossible* to get it to not alert under a "normal dive", which seems to make the Fast Ascent indicator completely redundant (except for allowing insurance companies to refuse to pay out?)
The detail follows:
I've seen the thread from 2007 where someone complained that they've had their Nemo complain about Fast Ascent on every dive.
Me too: Mine's logged 143 dives and apart from some very shallow things for example:
max depth 2.5m : 10m/min max ascent rate
max depth 3.8m : 9m/min max ascent rate
every dive shows a "Slow" meaning I've gone up too fast (equal or more than 12m/min)
The fact is: When ascending I'm watching it like a hawk and keeping it <9m/min consistently.
So it's totally demoralising when looking at my dive profile during the surface interval over a coffee and I see "Fast Ascent" every single time.
It appears that it complains when I raise my arm to take a look at it - I used to wear it on my left wrist but it alarmed when I raised my left arm to dump air from the dry suit; Now I wear it on the right wrist but still I reckon it alerts if I do a "normal" thing during a dive (e.g. go vertical to look at something on a wall; or go over a rock that's 1m up, or raise my wrist to look at the dive computer)
I used to be quite a paranoid "Is it me?" to the extent that I'd enter the dive log into a spreadsheet (20 second increments on the Nemo Wide) and work out my ascent rate, and be satisfied that it was around <5m/min over consecutive 20 second intervals (take the difference between two depths 20 seconds apart, and multiply that by 3 to get m/min)
My question is: isn't this a bit too sensitive? Shouldn't it have some tolerance? It would appear that it's *impossible* to get it to not alert under a "normal dive", which seems to make the Fast Ascent indicator completely redundant (except for allowing insurance companies to refuse to pay out?)
