It would appear that Garmin has the jump on Coros with the accuracy of the competitively priced 255and 965 models

Select to expand quote

Basti450 said..
there's a new official release 3.0509 for the apex pro now. description suggests it adresses the aforementioned issues with speedsurfing mode, hopefully containing the last beta's fixes.

Yes, I can confirm that speedsurfing mode on APEX Pro watches is back to working as normal with 3.0509.0.

TBH, I'd almost given up on the issue being resolved after numerous e-mails back and forth over the past 8 months.

Hopefully the VERTIX is also fixed, but nobody took up the offer to try the beta. Fingers crossed...

It's groundhog day... COROS recently released 3.0510.0 for the APEX Pro and VERTIX.

3.0510.0 has the same issue as 3.0508.0 and is therefore unreliable.

Full details - logiqx.github.io/gps-details/devices/coros/firmware/3.0510.0/

Anyone using 3.0508.0 or 3.0510.0 should downgrade to 3.0309.0

Instructions - logiqx.github.io/gps-details/devices/coros/firmware/3.0309.0/install.html

I have an Apex 2 with V 3.0910.0, but no other reasonable GPS devices apart from my phone. What can I do to help test/validate?