
A 6-inch (150 mm) semi-circular protractor designed for precise angular measurements in marine navigation. Perfect for plotting courses and bearings on nautical charts with accuracy.
Data sheet
Specific References
Navigate with confidence using this 6" (150 mm) semicircular protractor, designed for mariners who demand accuracy and reliability. Whether you're plotting a course, measuring bearings, or calculating angles, this tool delivers the precision needed for safe and efficient navigation. Built to withstand the demands of life at sea, it’s an indispensable companion for both seasoned sailors and aspiring navigators.
This semicircular protractor is more than just a measuring tool—it’s a critical asset for any mariner. Whether you're adjusting your course, verifying your position, or planning a voyage, its precision and ease of use make it a trusted choice. Designed for compatibility with standard nautical charts, it simplifies complex navigation tasks, allowing you to focus on what matters most: the journey ahead.
Precision Navigation Starts Here
When every degree counts, this 6" (150 mm) semicircular protractor ensures your navigation is as accurate as it is effortless. Designed specifically for marine use, it allows you to plot courses, measure bearings, and calculate angles with confidence. Whether you're navigating coastal waters or open seas, this tool provides the reliability you need to stay on course.
Optimized for Marine Charts
This protractor’s semicircular design is tailored for nautical charts, offering a clear and intuitive way to measure angles up to 180 degrees. Its 6-inch (150 mm) size strikes the perfect balance between precision and portability, making it easy to use in tight spaces like a boat’s navigation station. The graduations in English align with standard navigation practices, ensuring seamless integration into your workflow.
Built to Last in Demanding Conditions
Crafted for durability, this protractor is designed to withstand the rigors of marine environments. Its robust construction ensures it remains accurate and reliable, even in challenging conditions. Weighing just 0.5 kg, it’s lightweight enough for easy handling yet sturdy enough to deliver consistent performance trip after trip. Whether you're a professional mariner or a weekend sailor, this tool is built to meet your needs.
American Craftsmanship for Unmatched Quality
Manufactured in the USA, this semicircular protractor reflects a commitment to quality and precision. Every detail is carefully engineered to ensure it meets the high standards expected by navigators worldwide. New and ready for immediate use, it’s a tool you can trust from the moment you unpack it.
This 6" (150 mm) semicircular protractor is designed for marine navigation, offering a compact yet highly functional solution for measuring angles and plotting courses. With a semicircular shape, it provides clear and precise graduations in English, making it easy to read and use on nautical charts. Weighing just 0.5 kg, it’s lightweight and portable, while its durable construction ensures long-lasting performance in marine environments.
The protractor is made from durable, high-quality acrylic, ensuring clarity and longevity for precise navigation tasks.
Yes, the protractor is designed to work with both pencils and fine-tip pens, allowing for clear and accurate markings on nautical charts.
The degree markings are etched and filled with high-contrast ink, making them visible in various lighting conditions, though additional light may be needed in very dim settings.
Yes, the 6-inch semi-circular design is compatible with most standard nautical charts, allowing for accurate plotting of courses and bearings.
Store it in a dry, flat location away from direct sunlight and extreme temperatures to prevent warping and ensure long-term precision.
It does not include a protective case, but it is recommended to store it in a soft pouch or between protective sheets to avoid scratches.
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