Do you have your Garmin set to Smart tracking? That might be part of the reason?
Just checked - and yes! Thanks. Does that have a big impact on the distance? (and is that why my battery life always seemed so good?!)
That is exactly why your battery is so good. I think Smart only logs every time you change direction or your HR changes I think so it tends to not pick up small changes especially in the forest which is pretty important orienteering.
How do you check if smart tracking is on? I think I could also be having this issue.
Right, looks like you can't on the 220. That's annoying.
It's one of the things Jan Kocbach advises you to check about the watch before you buy it on his equipment sections way back in the day:
Not sure that it is still up to date.
Thanks for link. I hadn't even considered this when I got the watch but definitely something to look out for next time I'm getting a new one.