THREE ARM PROTRACTOR
• Arms are rigid enough to trace a bearing line
• Can be used to chart position from three identifiable shore, landmark or buoy locations
• Measure angles on the protractor and locate your position on chart
• Movable arms with vernier scale for even more precise measurements
• Flexible, clear construction
Dimensions: 6” x 21” (152 x 533 mm) | Wt: 0.31 lb (141 g)