Average Depth with Garmin Descent Mk1
Posted: Mon Aug 20, 2018 3:05 pm
I sent this as an email a few months but never got a response.
One thing I have noticed with the Garmin Descent Mk1 dives in MacDive is the average depth is out.
Are you pulling the average depth from the FIT file or calculating it? If you are calculating it, are you just adding up the all the depths in the samples and dividing by the number of samples? If so, this doesn’t take into account that the sample interval is variable, i.e. it is not every second.
For example, on one of my dives MacDive says the average depth is 14.43m. Garmin Connect says it was 14m. I also had my Perdix on the dive which says it was 14m. If I export the XML from MacDive and import into Subsurface it says 13.9m. If I calculate it manually, taking the missing samples into consideration I get 13.8.
Pretty much all my Garmin Descent Mk1 average depths are out. It also messes up SAC.
One thing I have noticed with the Garmin Descent Mk1 dives in MacDive is the average depth is out.
Are you pulling the average depth from the FIT file or calculating it? If you are calculating it, are you just adding up the all the depths in the samples and dividing by the number of samples? If so, this doesn’t take into account that the sample interval is variable, i.e. it is not every second.
For example, on one of my dives MacDive says the average depth is 14.43m. Garmin Connect says it was 14m. I also had my Perdix on the dive which says it was 14m. If I export the XML from MacDive and import into Subsurface it says 13.9m. If I calculate it manually, taking the missing samples into consideration I get 13.8.
Pretty much all my Garmin Descent Mk1 average depths are out. It also messes up SAC.