Is the cm is displayed?

Hello! Unfortunately just inches are displayed.

For taking basic nav course, could this be used instead of the standard par. rulers/divider/prot? iow, could i take base course using this? thanks

I would use this as an adjunct. You need to know how to use parallel ruler, dividers etc on a map for the navigation course.

What is the maximum distance between the 2 rulers, commonly called the opening width? Thanks!

Hi Caroline, this ruler does not open up, it is a rolling type of plotter. Regards Mark

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Marine Navigation Parallel Plotter

产品编号: 49578296

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细节

Item dimensions L x W x H
31.8 x 7.6 x
Brand
Weems & Plath
Colour
Black
Included components
Aluminum Two
Special feature
Aluminum for
Item weight
141 g

⚓Aluminum roller for smooth plotting

📏3 precise distance scales

🧭Integrated protractors for accurate bearings

描述

🧭 Master the waves with pinpoint precision and effortless style!

COMPACT DURABLE - Sleek acrylic design measuring just 3.5 x 12.5 inches, built to withstand marine conditions.
PRECISION BEARINGS - Includes semi-circular and quarter-circle protractors for exact course and bearing measurements.
READY WHEN YOU ARE - Comes with clear instructions on the storage sleeve—no batteries, no fuss, just reliable navigation.
NAVIGATE LIKE A PRO - Three distance scales (1:20,000, 1:40,000, 1:80,000) perfectly tailored for N.O.S. Coast and Harbor Charts.
EFFORTLESS COURSE PLOTTING - Aluminum roller assembly ensures smooth, precise parallel line transfers every time.

The Weems & Plath Marine Navigation Parallel Plotter is a compact, durable acrylic tool featuring three distance scales tailored for N.O.S. charts, an aluminum roller for smooth plotting, and integrated protractors for precise course and bearing measurements—ideal for professional and recreational boaters seeking reliable, hands-on navigation.

规格

Color	Black
Size	3-1/2 inches x 12-1/2 inches x 0.5 inches
Weight	1.5 kg
Shape	Rectangular
Material type	Acrylic
Features	Aluminum roller assembly for easy course plotting and parallel line transfer, protractors for measuring courses and bearings
Sport	Boating
Included components	Aluminum roller assembly, Semi-circular protractor, Two quarter circle protractors, Instructions on back of plastic storage sleeve
Batteries included?	No
Brand	Weems & Plath
Department	Women's
Manufacturer	Weems & Plath
Item model number	120
Product Dimensions	31.75 x 7.62 x 1.27 cm; 140.61 g
ASIN	B0000AY1BQ

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