Dive Stats: "Average" depth lower than "Minimum" depth

[Dirk Hohndel]

On Fri, May 30, 2014 at 09:45:18AM +0200, Lutz Vieweg wrote:
> On 05/30/2014 09:24 AM, Rick Walsh wrote:
> >Average should be the actual average depth.
> 
> Hmm... that is not a conclusive definition, though.

Yes it is. The average depth of all the dives that are included in the set
you are looking at.

> Do you think that "actual average" should be the
> average of the maximal depths of multiple dives,
> dividing the sum of those maximal depths by the
> number of dives, or should those depths be weighted
> by the duration of those multiple dives?

The latter.

> And BTW: Some dive computers continue to record
> samples as long as they are in "dive" mode", even
> if the DC is just 0.5m below the surface while the
> diver is waiting for a boat pickup. Other dive
> computers start/stop recording samples at 1.5m
> depth.
> This makes a whole lot of difference to the
> (IMHO questionable) value of the "average depth"
> computation.

Totally agree. We actually cut off dives that hover at 50cm - I think our
definition of surface is 75cm

/D