Weems & Plath Vectormaster gas turbines Daria Blackwell is the co-author

Daria Blackwell is the co-author of Happy Hooking - The Art of Anchoring

offering a faster and more accurate alternative to traditional parallel rules or triangles

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The first cruising logbook for navigators of powerboats

Weems & Plath Vectormaster gas turbines Daria Blackwell is the co-authorThe Weems & Plath Vectormaster is a versatile circular slide rule designed to solve a wide range of navigation problems quickly and accurately. With the position of a storm and its speed and direction, the Vectormaster helps you calculate the optimal course to maximise your distance from danger. This two sided tool is equally valuable for routine calculations at sea including time, speed, and distance, fuel consumption, and conversions. By rotating