
This dual-color Jean Cras ruler with a rotating protractor ensures precision. Engraved red, green, and black markings guarantee accuracy, while its flat edge simplifies chart readings.
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Designed for navigators who demand accuracy and ease of use, this versatile navigation ruler combines the best of the Jean Cras ruler and a rotating Topo protractor. Whether you're plotting a course in open waters or teaching navigation techniques, this tool ensures clarity and precision at every step. Its innovative design eliminates guesswork, making it a must-have for both seasoned sailors and those in training.
Unmatched Precision for Seamless Course Plotting
Say goodbye to the frustration of misaligned routes and unclear measurements. This navigation ruler redefines accuracy with its rotating arrow system, designed to align the route line effortlessly with your line of sight—no matter the direction. Whether you're navigating northern or southern routes, the tool adapts to your needs, ensuring every plot is precise and reliable. Its transparent PVC construction, just 1 mm thick, provides a clear view of your nautical chart while its engraved markings in black, green, and red offer instant readability. This is not just a ruler; it's a game-changer for navigators who refuse to compromise on precision.
Designed for Durability and Comfort
Built to withstand the rigors of maritime use, this ruler is crafted from high-quality PVC, combining lightweight portability with robust durability. Weighing only 0.8 kg, it’s easy to handle during long navigation sessions, yet sturdy enough to resist wear and tear. The engraved markings are designed to last, with angular indicators in red and green for 180° to 360° that remain sharp and legible over time. The exclusive flat surface ensures smooth gliding over charts, even in areas with dense printing, making it a pleasure to use in any condition.
Versatility for Every Navigation Need
Whether you're a professional sailor, a maritime student, or an enthusiast, this ruler is engineered to meet your demands. It includes essential scales like 1/50,000 and nautical miles (NM), making it compatible with a wide range of nautical charts. The bicolor design—featuring the Jean Cras ruler and a rotating Topo protractor—simplifies complex measurements, allowing you to plot courses and measure angles with confidence. French-language pictograms add an extra layer of intuitiveness, ensuring that even beginners can navigate with ease. At 380 mm in length, it strikes the perfect balance between compactness and functionality, fitting seamlessly into any navigation toolkit.
This navigation ruler is engineered for precision and durability, featuring a 380 mm length and a slim 1 mm thick transparent PVC construction. Weighing just 0.8 kg, it offers a lightweight yet robust design, with engraved markings in black, green, and red for enhanced readability. Angular indicators in red and green cover the 180° to 360° range, while included scales (1/50,000 and nautical miles) ensure compatibility with various nautical charts. The rotating arrow system and exclusive flat surface further elevate its functionality, making it a reliable tool for both professional and educational use.
The rotating arrow helps align the route line straight toward your eye, ensuring accurate readings even for southern routes on nautical charts.
The flat surface reduces glare and improves clarity when reading over printed areas of marine charts, making measurements easier.
It includes scales for 1/50,000 and nautical miles (NM) for precise distance measurements on charts.
Yes, its high precision, robust construction, and clear markings make it ideal for nautical training and demanding navigators.
The red and green engravings mark angles from 180° to 360° on both the protractor and the rule for quick reference.
The rule is made from transparent PVC with a thickness of 1 mm, ensuring durability and flexibility.
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