6-1/4" x 7-1/4". Printed in blue on plastic and laminated to ensure permanent calibrations.
7" x 1-1/4" clear plastic.
A simple device for calculating the third value given that you know the others.
Gives immediate solution to all speed-time-distance problems.
Permits rapid solution of problems involving vectors, such as those encountered in current sailing, determination of true wind direction and force, and apparent wind to be expected on other headings.
Proudly Serving Canada for over 25 years
The Binnacle 1065 Purcells Cove Rd. Halifax, NS, B3N 1R2