WHAT KIND OF BOAT DO YOU HAVE?
A powerboat compass has fixed lubber lines to maintain the best dynamics, while steel boats need compasses with D-correctors or soft iron correctors
WHAT IS THE SIZE OF YOUR BOAT?
The simple rule of thumb is that a boat longer than 7.5 meters (25 feet) requires a 100 series capsule or larger. This translates into an apparent scale of 100 mm or more.
WHERE WILL THE COMPASS BE MOUNTED?
There is a SILVA compass for every mounting alternative: bulkhead, dashboard, headlining, mast, ect.