We have never stipulated which type of compass to bring along on one of our skills courses. However recently a number of people have turned up with inappropriate compasses or even compasses that don’t work!
Compasses from reputable brands (Silva, Sunto, Recta, etc.) should do the job but for learning purposes a decent length of base plate and a range of measuring scales is helpful.
The compass that we would choose is the Silva Expedition 4 (but make sure it’s not the military model). Shopping around (Amazon) you can get one for less than £20 and unless you are like me and shut one in the car door they will last many years!
Peak Navigation Courses run navigation classes at all levels throughout the year based in the Peak District National Park. Even if you don't book with us, we are always happy to advise you on equipment, routes, etc.