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

Join PRO & Unlock Exclusive Perks!

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Our Other Brands:Hewyn|Selfship

Marine Navigation Parallel Plotter

Product ID: 49578296

Secure Transaction

Details

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

Description

🧭 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.

Specifications

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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

$209.45

Duties & taxes incl.

Northern Mariana Islandsstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews