Weems & Plath triangular protractor with or without handles allows you to slide one triangle along the other to the desired meridian or compass rose, using the protractor scales inscribed on all three sides, making it easy to align either the 90 or 45 degree angles.
Professional Protractor Triangle W&P 108 The Professional Protractor Triangle with handle is larger than other navigation triangles on the market with legs that are 9.312 inches long and a hypotenuse (long side) 13.125 inches long. It has both 320mm & 1-80,000 scales and is constructed of heavy duty clear 5 mm thick acrylic for durability with a handle for ease of use. Both pencil and pencil sharpener are included with the Professional Protractor Triangle and this product is backed by a lifetime warranty.
Nautical Gifts for the mariner in your life! Take a PEEK.