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

Product ID: 1404625

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Details

Item dimensions L x W x H
12.5 x 3 x 0.5
Brand
WEEMS & PLATH
Color
black
Included Components
Aluminum Two
Item Weight
0.31 Pounds
Size
3-1/2 inches x

⚓Marine-grade aluminum roller

📏3 precise distance scales

🧭Integrated semi-circular protractor

Description

🧭 Navigate Like a Pro — Don’t Just Sail, Command the Seas!

PROTRACTOR POWER - Includes a semi-circular and two quarter-circle protractors for accurate course plotting and angle measurements.
COMPACT PORTABLE - Slim 12.5 x 3 x 0.5 inch profile fits easily into your marine toolkit or chart bag without weighing you down.
SLEEK DURABLE DESIGN - Lightweight aluminum roller assembly combines durability with effortless handling for seamless chart plotting.
TRUSTED NAUTICAL BRAND - From Weems & Plath, a name synonymous with precision marine instruments trusted by professionals worldwide.
PRECISION AT EVERY SCALE - Three distance scales (1:20,000, 1:40,000, 1:80,000) perfectly tailored for N.O.S. Coast and Harbor Charts ensure pinpoint navigation.

The Weems & Plath Marine Navigation Parallel Plotter is a precision plotting tool featuring three distance scales optimized for N.O.S. charts, a durable aluminum roller, and integrated protractors. Its compact design and trusted brand heritage make it an essential instrument for professional and enthusiast mariners aiming for flawless navigation.

Specifications

Item dimensions L x W x H	12.5 x 3 x 0.5 inches
Brand	WEEMS & PLATH
Color	black
Included Components	Aluminum roller assembly, Semi-circular protractor, Two quarter circle protractors, Instructions on back of plastic storage sleeve
Item Weight	0.31 Pounds
Size	3-1/2 inches x 12-1/2 inches x 0.5 inches
OEM Part Number	120
Global Trade Identification Number	00721002001207
Automotive Fit Type	Universal Fit
Manufacturer	Weems & Plath
UPC	721002001207
Item Package Dimensions L x W x H	13.46 x 4.17 x 0.71 inches
Package Weight	0.17 Kilograms
Item Dimensions LxWxH	12.5 x 3 x 0.5 inches
Brand Name	WEEMS & PLATH
Country of Origin	China
Suggested Users	womens
Part Number	120
Sport Type	Boating

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