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PARALLEL RULER WITH CAPTAIN FIELD'S GRADUATIONS

$48.99NZD

LINEX PARALLEL RULER WITH CAPTAIN FIELD'S GRADUATIONS

These emulate top-of-the-line professional parallel rulers, as would be found in the hands of many professional ships officers today.

The Captain Fields scale can best be described as starting life as a 360° protractor, subsequently folded in half along the N/S axis and elongated to fit the length of the ruler. The scale is used against a meridian of longitude to read direction in degrees true; this eliminates the need to walk all the way to the compass rose.

The scale print on the ruler is much larger, and can be read with greater precision than the compass rose as printed on the chart. Few non-professionals are taught to use a Captain Fields scale, yet it is a very big improvement on the charted rose.

Our rulers have a sheet giving directions on how to use the Captain Fields scale. Our experience is that the 400 mm version is by far the most popular. As shown - fitted with aluminium arms.


Add to Cart:

  • Model: LINEX PARALLEL RULER WITH CAPTAI


This product was added to our catalog on Thursday 27 June, 2013.

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