Need to know where you are going, which direction then you need a compass. Some have electronics built in giving temp, humidity and more.
Compass
Jack Pyke Compass on Lanyard - Mil-Com
Compass on Lanyard - Mil-Com Ideal for walking, outdoor sports and people learning orienteering. Clam packed Diameter: 5cm (approx.) Diameter: 5cm (approx.)
£3.99