How To Guides

In our series of how-to guides, we will show you the techniques used to correctly operate the tools we provide to the aviation, and maritime industries, as well as graphic designers, architects, and students. Please note that our guides are intended as just that, a guide. Please seek professional instruction before attempting to use these tools yourself.

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How to use a Body Shape Calculator

Health, How To Guides

This guide shows how to use a body shape calculator. It supports informed discussions about body composition, fitness goals, and maintaining a healthy lifestyle.

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How to Use a Portland Speed-Time-Distance Calculator Slide Rule: A Step-by-Step Guide

Aviation, How To Guides, Maritime, Navigation

A guide to how to use a Portland Speed-Time-Distance Calculator Slide Rule. A traditional yet efficient tool for mariners, aviators, and navigators. It simplifies the calculation of speed, time, or distance based on two known variables.

How to Use a Portland Speed-Time-Distance Calculator Slide Rule: A Step-by-Step Guide Read Guide

P7431 Portland Course Plotter on map – corrected plotter image

How to Use a Portland Plotter: A Step-by-Step Guide

How To Guides, Maritime

Read about how to use a Portland Plotter, often referred to as a nautical protractor. A vital navigation tool used by mariners for chart plotting. Its primary purpose is to measure angles and courses on nautical charts, ensuring a vessel stays on the right heading.

How to Use a Portland Plotter: A Step-by-Step Guide Read Guide