The Ritchie Explorer Surface Mount Compass features a 2.75 inch direct-reading dial in white housing. When properly sized, installed and compensated a marine compass is the most important instrument on any boat. It will provide accurate, trouble-free heading references under the most adverse conditions without relying on electricity, radio signals or satellite communications. The most important criteria when selecting a compass are dial size and mounting style. Quality components aid accuracy, smooth response, stability and trouble-free operation. Modern technology makes Ritchie Compasses the World's Best Marine Compasses.• Dial Size: 2 3/4 Inch• Mounting: Surface Mount• Dimensions: 3-5/8 Inch W x 2-7/8 Inch H• Color: White• With Built In Compensators: Yes 2-3/4 Inch Direct Read Dial 3-5/8 Inch Width x 2-7/8 Inch Height Overall Dimension With Built-In Compensators | Explorer Surface Mount Compass, White