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OnBuy.com£21.76Visit shop Liquidraw Portland Course Plotter Navigation Divider Marine Nautical Protractor
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The Liquidraw Portland Course Plotter is an all-in-one navigation tool designed for sailors, yacht navigators, and maritime students. It simplifies plotting bearings and measuring distances on nautical charts, enabling accurate route planning for coastal cruising and exam preparation. While it offers robust functionality and clear markings for easy readability, users should be aware that it is best suited for use with standard nautical charts and may require practice for optimal precision.
| Model Part Number | Portland |
|---|---|
| Brand | Liquidraw |
A Portland-style course plotter is a specific type of navigation tool used on nautical charts to measure distances and plot courses (bearings) efficiently, often featuring integrated scales and protractors.
No, this plotter is designed specifically for use with traditional paper nautical charts and is not intended for digital navigation systems.
Align the plotter's parallel rules with your desired course line on the chart, then rotate the protractor scale to the correct heading relative to North. Mark the bearing or use it to draw a course line.
Its primary benefit is simplifying and increasing the accuracy of essential chart work, such as plotting bearings and measuring distances, making navigation planning more efficient.
Yes, this navigation set meets the requirements for many sailing certifications, including RYA Day Skipper and Yachtmaster exams, where accurate chart work is essential.
You typically align the plotter's distance scale with the chart's latitude scale (since one minute of latitude equals one nautical mile) to measure distances directly on the chart.
The plotter is made from durable, transparent plastic designed for frequent use.
Ensure adequate lighting. Clean the plotter surface with a damp cloth to remove any smudges or dirt that may obscure the markings.
Store the plotter flat in a cool, dry place away from heat sources. Warping can sometimes occur if exposed to prolonged high temperatures.
For very long distances, consider breaking the measurement into smaller segments or using the plotter in conjunction with a known scale on the chart to ensure maximum accuracy.
Setup: No setup is required. The Portland Course Plotter is ready for immediate use upon unboxing. Simply lay it flat on your nautical chart.
Compatibility: This plotter is designed for use with standard paper nautical charts. It is compatible with most common chart scales where bearings and distances need to be measured or plotted.
Care: To maintain its clarity and accuracy:
