zlacker

>>tobr+(OP)
In sixth-sense terms, I once heard of experiments with a belt which would vibrate to indicate magnetic north. Apparently people really missed it when they had to give it up.

>>a9h74j+nF4
You're thinking of North Paw, perhaps, which is an anklet (https://sensebridge.net/projects/northpaw/)

>>Smaug1+1Q4
Commercialized: > The original idea for North Paw comes from research done at University of Osnabrück in Germany. In this study, rather than an anklet, the researchers used a belt. They wore the belt non-stop for six weeks, and reported successive stages of integration.