GPS+GALLILEO+1SEC
The smooth tracks were produced by the wearing the watch upside down going out and the squiggly ones are coming back wearing the watch in a regular position.
I saw a thread on the F6 how wearing it upside down produced better results as the antenna is at 12,0lock so facing downwards towards the ground. Wearing it upside down the antenna faces the sky.
Would be interested for anyone to test this? Wear it upside down going out and then switch to regular coming back and see if you get different results?