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30 lis 2023 · To use a parallel ruler, start by identifying your current position and your intended destination on the chart. Align the edge of the ruler with these two points. Keeping one arm of the ruler fixed, rotate the other arm to align it with the nearest compass rose on the chart.
14 paź 2024 · The average sale price for Maritime Parallel Rules is $30.00. The lowest current price is $9.99. The highest current price is $345.00.
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Parallel rulers were first developed in the 16th century but not adopted by navigators much before the 1700s. They work with the compass rose on the chart to transfer any angle – for instance for a position line, course we have steered or course we want to steer.
Of all our traditional parallel rules, the 15-inch (38.1cm) Brushed Aluminum Arm Parallel Rule is a best-seller. This sturdy acrylic parallel rule includes a protractor scale, is easy to use, and is a necessary tool for every seagoing navigator.
The online source of British manufactured high quality nautical instruments and chart work tool for both the professional mariner and the discerning yachtsman. Including Brass Navigation Dividers and Compasses. Parallel Rulers and Admiralty Pattern Marine Rolling Rullers.
19 lut 2024 · Parallel rulers are used to plot direction on your nautical chart. They are, essentially, two straight-edges hinged so that they maintain the same angle. By alternating the moving edge, and securely holding down the non-moving edge, you can move the rulers about the chart while still maintaining the same angle.
