Weems & Plath Marine Navigation Parallel Plotter
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Weems & Plath Marine Navigation Parallel Plotter

4.4/5
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
  • Special Feature
    Aluminum for
  • Item Weight
    4.96 ounces
Aluminum roller for smooth plotting
📏3 precision distance scales
🧭Semi-circular & quarter-circle protractors

Description

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

  • PROTRACTOR POWER - Includes semi-circular and two quarter-circle protractors for precise course and bearing measurements.
  • COMPACT LIGHTWEIGHT - Slim 12.5 x 3 x 0.5 inch design weighing under 5 ounces—ideal for on-the-go marine navigation.
  • TRUSTED NAUTICAL BRAND - From Weems & Plath, a name synonymous with quality marine instruments for generations.
  • 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.
  • EFFORTLESS COURSE PLOTTING - Durable aluminum roller assembly ensures smooth, accurate parallel line transfers every time.

The Weems & Plath Marine Navigation Parallel Plotter is a manual navigation tool featuring three distance scales optimized for N.O.S. charts, an aluminum roller for smooth plotting, and multiple protractors for accurate course measurement. Compact and lightweight, it’s designed for boating professionals and enthusiasts who demand precision and reliability on the water.

Specifications

Item dimensions L x W x H12.5 x 3 x 0.5 inches
BrandWEEMS & PLATH
Colorblack
Included ComponentsAluminum roller assembly, Semi-circular protractor, Two quarter circle protractors, Instructions on back of plastic storage sleeve
Special FeatureAluminum roller assembly for easy course plotting and parallel line transfer, protractors for measuring courses and bearings
Item Weight4.96 ounces
Operation ModeManual
ShapeRectangular
OEM Part Number120
Global Trade Identification Number00721002001207
ManufacturerWeems & Plath
UPC721002001207
Lens Curvature DescriptionFlat
Item Package Dimensions L x W x H13.46 x 4.17 x 0.71 inches
Package Weight0.17 Kilograms
Item Dimensions LxWxH12.5 x 3 x 0.5 inches
Brand NameWEEMS & PLATH
Country of OriginChina
Suggested Userswomens
Part Number120
Sport TypeBoating

Have a Question? See What Others Asked

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

Reviews

4.4

All from verified purchases

J**E

Not bad

Works as intended but quality not the best. Plastic can warp easily.

M**C

Lovely design

I am a Airbus A380 pilot and are required by regulation to ensure that the navigation system is following the proper course across oceanic areas by plotting on a chart. One of the complexities that can occur is Air Traffic Control issue a re-route which necessitates the determination of initial True Tracks and distances between successive waypoints. Normally this is done with a table and can take several minutes, however with this plotter the job is very easy, even on the table provided on the Airbus. Construction of a very high standard.

G**E

All is perfect.

Product as expected, perfect.

J**M

Good alternative to parallel rule

I prefer this to a parallel rule. It is much easier to use on the smaller format of chart books. It's size and the roller aspect to its operation make it easier to use and less subject to slipping.

K**M

It Works

Works good. Made out of 1/8" sturdy plastic (probably won't take bending at all). Wheels seem to grip plotting and chart paper reasonably well.It is about 12.5 inches long so you need a bit of room to use it - especially to keep the wheels on a level, gripping surface. It will go in my chart kit and out to sea.

R**O

Defective

This device is intended to make accurate navigational measurements. This design can be faster to use than parallel rulers. I have utilized this exact model on my teacher's yacht, and it works great. However, I have purchased three, and returned three. The first was broken. The acrylic ruler was broke in two. The second had 0.5 degree of looseness. The third is also noticeably loose. Unacceptable for navigation. Do not buy.

C**A

Works exactly as expected

Never thought using one of these would be a big deal, until I got stationed in Germany. I have always used this product as a Surface Warfare Officer in the US Navy, and when I got stationed in Germany, found out that the German Navy uses these 2 plastic triangles to do the same thing. Rolling Wheems are much better, and that's why I ordered this product. Nothing like owning yourself what you use every day on a destroyer underway!

J**.

Zoom! Zoom! Zoom!

These devices are used in plotting navigation courses and in this particular instance, the constantly evolving waters in the Gulf of Mexico. A parallel ruler is rather old-school and funky in comparison to these doo-hickies. EZ to order coupled with lightning-fast processing and delivery. Happy Camper!

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Weems And Plath Marine Navigation Parallel Plotter | Desertcart South Korea