Cammenga!!!
Go to landnav.org for some excellent info on the use of this compass.
Cammenga.com has a review/comparrison on their site side to side against the baseplate compasses that is a real eye opener as well.
Another point. Baseplate compasses and many knockoffs of the cammenga are liquid filled and dampened which can and does lead to problems. The cammenga is induction dampened so the needle stabilizes much quicker. It is also much more forgiving in use and easier to read.
Go to landnav.org for some excellent info on the use of this compass.
Cammenga.com has a review/comparrison on their site side to side against the baseplate compasses that is a real eye opener as well.
Another point. Baseplate compasses and many knockoffs of the cammenga are liquid filled and dampened which can and does lead to problems. The cammenga is induction dampened so the needle stabilizes much quicker. It is also much more forgiving in use and easier to read.