Discussion: ONA cover mystery

A friend recently pointed out something peculiar on the two most recent ONA covers and asked me what was going on. I hadn't noticed it before they pointed it out, and could not come up with an answer.

The covers show two orienteers (Austin Fowler, Evalin Brautigam), each wearing thumb compasses, and yet both are carrying their map in their non-compass hand. Why are they doing that? Is this some new technique that has swept the orienteering world?

Those crazy younguns.

Both pictures seem to be past the 'GO' control, and maybe they really only switched for sprinting down the shoot, although you would want your e-punch hand free for the finish.

I've overheard conversations about holding the map in the same hand as your compass, but I actually tend to have it in the opposite hand quite a lot while running, but when I'm using my compass I switch or hold the map with both hands. I also switch it to the compass hand when I'm punching.