Course triangle
The course triangle (seldom also referred to as the navigation triangle ) is a part of the map set and is a navigation instrument for working on a nautical map (seafaring, aviation). It is comparable to a set square . For a course triangle, the graduation runs from 0 ° - 180 ° and 180 ° - 360 ° (set square: 0 ° -180 ° / 180 ° -0 °). Together with a positioning triangle or positioning ruler, angles of all kinds can be plotted or read out at any point on the nautical chart by parallel shifting . A second course triangle can also be used as a lay-on triangle.