I am not an explorer, but I spend lots of time in the outdoors of Scotland and I have found this tiny little compass has become a great friend. No, it could never replace a full size compass, but then it was never designed for that. However, as an every day, permanently attached assistant, it instantly becomes a valued and trusted tool that is perfect for its intended task, relatively accurate and with that inherent Silva build quality. If you don't always have a full size compass with you, or just as an occasional direction finder, the Silva 40 is unsurpassed at this price. And the night time visibility and usage is actually surprisingly good. Can't recommend it highly enough.