These silly little compasses might be useful in orienting yourself in a large parking lot, but you'd be a fool to travel in the bush relying on these pieces of junk. If you really want to navigate reliably, get a Suunto KB-14 or a Suunto MC-2G, Sunto M3G, or something comparable. Also, familiarize yourself with how to land navigate by knowing how to convert a True North or Grid North map reading to a Magnetic Bearing and vice versa. Remember also to remove your knives, multi-tools, hatchets, axes, and any other items that might adversely affect your compass reading. Don't make the mistake of venturing cross country without having a solid grounding in land navigation using a map & compass. This advice is coming from a Registered Professional Land Surveyor in Texas with years of exploration experience laying out hundreds of miles of seismic exploration lines using a Suunto KB-14. For high altitude work, your going to need a Brunton geologist's compass. Many good internet/YouTube articles you can refer to. You can thank me later, when you make it back in one piece, hopefully.