An advanced navigation tool, the circular slide rule provides for the solution of time, speed and distance, fuel consumption, conversions, multiplication, and division.
On the reverse, the face of the Vectormaster permits rapid solution of problems involving vectors, such as those encountered in current sailing, the determination of true wind direction and force, and the apparent wind to be expected on other headings.
Given the position of a storm, and the direction and speed of its advance, may quickly determine the course which will put maximum distance between your vessel and the oncoming storm.
This Weems & Plath Vectormaster includes an instruction booklet.
