I noticed Snowgrouse was floating in the briney as well.

I got some tips from vilakins or I'd probably still be floating myself. In essence, she says: Don't use the world map, click on the tab at the top to get 'United Kingdom' or whatever. Then input the name of a large town near you; then use the X4 zoom in, and *only* then do you click where you live on the map.

If you're already on the map as I was, you have to go through an extra step which is essentially security to prevent anyone else altering your location.