I tried also Galileo and finally wrote gps ready. Now is raining but I would try a little run. In the forum seems that there was no problem with running only for sea swim....
Yes, it works on the Fenix 5 (at least it does in conjunction with the 10.53 beta software on my Fenix 5). You’ll need to go to the Fenix 5 Plus forum and go to the latest 4.61 beta thread, download the zipped file, extract all and then get the file out of the folder for GPS software. That file then goes in the Garmin/RemoteSW folder on your Fenix 5. As previously mentioned, although it works, this is all at your own risk as GPS 2.23 hasn’t officially been made available for the Fenix 5 (production or beta).
OWS still doesn't work for me. I swam 2000 m in an official measured OWS contest. with 10.10 and gps 2.23. The result says 1551m, and i was swimming over land. So still no improvement for me in OWS. Maybe even worse than 2.20.
Wow, I’ve always expected the 935 to come out smelling of roses with GPS tracking given the plastic body and lack of sapphire glass to impede the GNSS signals. Anyway, to provide some balance here is a run from yesterday afternoon. Both Fenix 5 and Fenix 5 Plus are on my left arm (F5+ on usual wrist position and F5 10cm further up my forearm using a Velcro strap as a larger band). Both watches have GPS 2.23 installed, with settings configured to GPS+Galileo and Every Second recording (ignore pace as that is from my RunScribe pods and uncalibrated, Distance is from GPS though). For reference, I carefully remeasured this route on gpsiess.com and it was 7.11 miles (11.44km) and I’ve also included links to the same run done 2 months ago when both watches had GPS 2.20.
I’m really pleased with the distance accrual on both watches with GPS 2.23 (7.12miles on the watches vs 7.11miles actual remeasureed), with my 1/4 mile auto laps chiming in near unison throughout the run. From my past experience of comparing tracks from my F5/5+ watches and a friend’s 935, I would expect the 935 to be equal or even better for the reasons mentioned earlier.