Description
The Weems & Plath Protractor Triangle with Handle is a nautical protractor designed for precise course plotting and traditional navigation on nautical charts. With a 19.7 cm (7¾”) cathetus and a 27.9 cm (11″) hypotenuse, it provides a large and stable working surface, making it well-suited for both navigation instruction and practical use on board.
The built-in pencil holder makes it easy to draw course lines directly on the nautical chart with high precision. The clear degree scale in red and black provides good contrast and makes it easy to read, while the right 90° angle is useful for establishing position lines and other navigation tasks.
The protractor is made of clear, durable vinyl plastic, which provides a clear view of the map while withstanding many years of use on board.
This model uses inch measurements, as is common on American navigation equipment. This makes it a natural choice for users who work with American navigation aids or prefer Weems & Plath’s well-known products.
The Weems & Plath Protractor Triangle with Handle can be used on its own, but is specifically designed for use with an identical protractor. By sliding one protractor along the other, course lines and bearings can be moved across the nautical chart without changing the direction—a classic and highly precise method in traditional chart navigation.
Weems & Plath is one of the world’s most renowned manufacturers of marine navigation equipment, and this protractor is an excellent choice for recreational boaters, sailors, navigation courses, and professional navigators who want a high-quality, rugged navigation tool.






