I wanted to add one note regarding the relative NDLs provided by Suunto wrist/watch computers vs the Teric and that is that the Teric, at the Medium NDL setting (as in medium conservative, with Low being less conservative/more aggressive and High being more conservative/less aggressive) is significantly more conservative and provides less NDL time than the Suuntos.
I owned both a D4i and the Teric and did a side by side comparison in dive planning mode and was really surprised by this. For example, using 21% (air) setting for gas:
- at 60 feet the Suunto NDL was 50 mins vs 43 for the Teric
- at 90, Suunto 21 vs 17 Teric
- at 100, Suunto 17 vs 14 Teric
Starting at 110ft, the difference leveled off to 1 minute or even.
With 32% as the gas setting, the same was true:
- at 60 feet the Suunto NDL was 78 mins vs 76 for the Teric
- at 90ft, Suunto 33 vs 28 Teric
- at 100, Suunto 27 vs 22 Teric
- at 120, Suunto 17 vs 10 Teric
I wore both watches while diving pre-COVID, and I found that during repetitive diving the differences were even greater. The D4i routinely gave me substantially more NDL time than the Teric and the Teric even went into deco a couple of times when the D4i still had 5 or more minutes of NDL left.
This reviewer noted this fact in his lengthy comparison of the D5 vs the Teric vs a couple of other wrist computers, here is the link
You can see for yourself in the video at around the 5:00 mark the D5 is showing 24 minutes of NDL while the Teric shows 17. I don't know what setting the reviewer had the Teric on though.
Now, obviously, many (maybe most?) Teric users are either tech or other highly skilled divers who set their own gradient factor, etc. But I am not one of those, and I did not like the idea of tinkering with this, especially since everyone says Suunto is one of the most conservative algos out there.
So I kept my D4i and sold the Teric and, when the time comes, I will probably upgrade to the D5.
Just FWIW.