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Weems & Plath Light
Rule - Colregs (190)
£21.50
If you have ever been on the water at night & wondered if the marine navigation lights you see are from an approaching or fleeing vessel, or if the vessel is a fishing trawler or super tanker, then LIGHTrule is for you. This simple-to-use vessel identification tool is inexpensive security for night travel & should be an essential part of the equipment found on any boat. LIGHTrule is also an excellent aide for navigation classes & Coast Guard exams.
- Identifies all COLREGS- Displays 60 light configurations- Displays 15 day shapes- Actual view of vessel for port, starboard, bow & stern lights- Visual guide for horn signals- Magnifying lens for clear readability of definitions- Durable plastic construction- Lifetime warranty
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Archived Product
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Weems & Plath
Light Rule - CEVNI 191
£21.50
This version of the Light Rule is for the European Inland Waterways which have a unique system of lights for vessel identification called CEVNI. This simple to use vessel identification tool shows the actual view of vessels for port, starboard, bow & stern lights on European Inland Waterways. The right bank or right-hand side of the channel & the left bank or left-hand side of the channel are seen from the perspective of an observer facing downstream (downhill on a canal). The European Light Rule CEVNI is inexpensive security for night travel & should be an essential part of the equipment found on any boat traveling on European Inland Waterways.- Identifies lights & shapes as prescribed by European code for inland waterways- Displays 53 light configurations- Actual view of vessels for port, starboard, bow & stern lights- Displays 18 maneuvering & warning signals- Visual guide for horn signals- Magnifying lens for clear readability of definitions- Durable plastic construction ...
Archived Product
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Weems & Plath Nautical
Slide Rule (105)
£14.99
The Nautical Slide Rule offers a foolproof, immediate solution to all common speed/time/distance problems & is convertible to statute or nautical miles. It also allows the user to compute distance in yards if the speed is factored in knots. The Nautical Slide Rule is sometimes referred to as a Time Speed Distance Calculator.- Immediate solution to all speed-time-distance problems- Equally applicable for nautical or statute miles- Speed in knots or mph; time in hours, minutes or seconds; distance in nautical or statute miles, or yards if speed is in knots- Easy-to-read & accurate- Lifetime warranty ...
Archived Product
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Weems & Plath Original
Bi-Rola Ruler (155)
£65.99
The Bi-rola Rule is a rugged plotter that is used by professional navigators because it is quick & easy to use. The patented vertical & horizontal rolling motion simplifies course & plotting calculations.
- Adjustable radial arm allows automatic compass corrections in course plotting- Roller body with protractor markings & nautical mile scale- Radial arm has Loran interpolator scales & 200 millimeter rule- When radial arm & body are used jointly, the Bi-Rola becomes a 17 inch divider- Speed/ time/ distance table included- Easy to follow instructions on back of protective, durable vinyl pouch- Lifetime warranty
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Archived Product
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Weems & Plath Parallel
Plotter (120)
£18.50
The Weems Parallel Plotter is our most popular rolling plotter. It is mounted on an aluminum roller assembly that means that you can plot courses & parallel lines with simple direct transfer & doesn’t require the space that traditional parallel rules or triangles need. The roller keeps the plotter parallel as you slide it across the chart. It

Includes:: distance scales at 1:20, 000, 1:40, 000 & 1:80, 000 to fit U.S. Coast & Harbor Charts, as well as an inch scale. A semi-circular protractor for measuring course & bearing against meridian on a chart & two quarter circle protractors for measuring course & bearing against parallel of latitude are built into the plotter. It is also used for measuring or laying off courses & distances on a nautical chart.- 12-1/2 inches (31.75cm) long
- Durable acrylic plotter mounted on marine aluminum roller assembly-

Includes:: distance scales at 1:20, 000, 1:40, 000 & 1:80, 000 to fit U.S. Coast & Harbor Charts- Inch scale- Semi-circular protractor- Two quarter circle protractors- Instructions on back of plastic storage sleeve- Lifetime warranty




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Archived Product
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Weems & Plath
Protractor Triangle
With Handle (101)
£11.99
Often used in a combination of two, our Protractor Triangle with Handle provides a straightforward method of plotting & performing chart work. Each triangle is inscribed with contrast enhancing colors (red & black), plus a handle that holds a pencil, making it convenient & easy to use. The protractor scale on the triangle can aid in drawing a bearing line on a chart, & the 90° angle is helpful when determining lines of position. When used in pairs, the second triangle acts as an extension, & the pair together are a reliable means to transfer a directional line on a chart with no slippage.- 19.69 cm x 27.94 cm hypotenuse- Inscribed with contrast-enhancing colors (black & red)- Black handle with pencil holder for easy maneuverability- Used as a pair to transfer a directional line on a chart- Protractor scale allows easy alignment with chart meridian in any direction
- Direction is maintained as one triangle is slid along the other to desired position- 90 degree angle helps determine lines of position- Made from clear durable vinylite- Lifetime warranty
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Archived Product
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Weems & Plath Road
Rule - CEVNI Buoyage
(291)
£21.50
The ROADrule CEVNI is a quick reference tool that identifies navigation aids & markers as prescribed by the European Code for Inland Waterways. It takes a large amount of complex information & makes it easy to understand using a sliderule design with a magnifying lens.- Identifies navigation aids & markers as prescribed by the European Code for
- Inland Waterways- Displays 38 Navigation Aid Definitions- Displays 12 Rules of the Road- Magnifying lens for clear readability of definitions- Durable plastic construction- Lifetime warranty
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Archived Product
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Weems & Plath Road
Rule - IALA Buoyage
(292)
£21.50
ROADrule IALA identifies the International Association of Lighthouse Authorities Maritime Buoyage System for Regions A & B, including all types of fixed & floating marks. This simple to use navigation aid shows the actual view of maritime buoyage systems with corresponding chart symbols. It takes a large amount of complex information & makes it easy to understand & quick to refer to with a design that is similar to a slide-rule. Whether in a classroom or at the helm, critical decisions can be made quickly & with complete confidence with the aid of ROADrule IALA.- Identifies International Association of Lighthouse Authorities Maritime Buoyage
- System for Regions A & B- Displays 20 light characteristics- Displays maneuvering & warning signals- Displays 12 Rules of the Road- Displays 40 Navigation Aid Definitions- Magnifying lens for clear readability of definitions- Durable plastic construction- Lifetime warranty
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Archived Product
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Weems & Plath
Ultralight Divider And
Compass (176)
£14.99
Our Ultralight Dividers are the perfect tools to fill out your navigation kit. They are the best-selling navigation tool in our whole product line, & for good reason. Constructed of coated marine alloy to resist corrosion, these durable dividers are fully adjustable & easy to use. They feature a unique center adjustment mechanism that allows quick, precise one-hand operation. Both tips can be interchanged with stainless steel points or pencil leads to turn the divider into a compass.
- 7-inches (17.78 cm) long- Coated marine alloy & plastic to resist corrosion- Center gear mechanism for easy use- Spare point, knob & lead provided- Made in Germany- Lifetime warranty
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Archived Product
Weems & Plath Vectormaster (501V)
Weems & Plath
Vectormaster (501V)
£35.99
With the aid of a Vectormaster, you may quickly determine a course that will put maximum distance between your vessel & an oncoming storm, given the position of a storm & direction & speed of its advance. This circular slide rule can be used to determine the solution of time, speed & distance, & fuel consumption. It can also be used for conversions, multiplication, & division. Turning the dial on the face of the Vectormaster permits rapid solution of problems involving vectors, such as those encountered in current sailing, determination of true wind direction & force, & apparent wind to be expected on other headings.
- Two-sided circular slide rule- Sturdy PVC construction- Instructions on backside- Lifetime warranty
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Archived Product

Weems & Plath Paralock Plotter (90)

This compact GPS parallel rule is well-suited for use on small chart tables. The primary purpose of the ParaLock Plotter is to enable the transfer of GPS positions rapidly, easily, and accurately to and from any paper chart. This unique plotter features three unique design concepts: 1) The black locking knob is friction adjustable for fast lat/long transfers. It enables the two rulers to be fixed in any given separation, which allows rapid determination of GPS position. 2) Two sets of finger holes enable finger tips to act as friction pads on the underlying chart and inform the navigator if the rule has slipped while plotting. 3) The ParaLock Plotter is only 7.25 inches (18.42cm) long, as opposed to the standard rule length of 15 inches (38.1cm), but its opening width is the same as
standard rules. - 7-1/2 inches (19.05cm) long- Sturdy, clear acrylic for maximum chart visibility- Locking knob- Finger holes - Graduations for use as protractor to determine compass bearing- Ruler across bottom to transfer distances to mileage scale- Fits in a pocket or drawer- Plastic Storage sleeve with instructions on back- Lifetime warranty
RIP - This product is no longer available on our network. It was last seen on 25.09.2019

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  • External links may include paid for promotion
  • Availability: Out Of Stock
  • Supplier: Stanfords
  • SKU: 0721002004413
Availability: In Stock
£18.99
non-fiction & reference Non-Fiction & Reference
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Product Description

This compact GPS parallel rule is well-suited for use on small chart tables. The primary purpose of the Para Lock Plotter is to enable the transfer of GPS positions rapidly, easily, & accurately to & from any paper chart. This unique plotter features three unique design concepts: 1) The black locking knob is friction adjustable for fast lat/long transfers. It enables the two rulers to be fixed in any given separation, which allows rapid determination of GPS position. 2) Two sets of finger holes enable finger tips to act as friction pads on the underlying chart & inform the navigator if the rule has slipped while plotting. 3) The Para Lock Plotter is only 7.25 inches (18.42cm) long, as opposed to the standard rule length of 15 inches (38.1cm), but its opening width is the same as standard rules.
- 7-1/2 inches (19.05cm) long- Sturdy, clear acrylic for maximum chart visibility- Locking knob- Finger holes
- Graduations for use as protractor to determine compass bearing- Ruler across bottom to transfer distances to mileage scale- Fits in a pocket or drawer- Plastic Storage sleeve with instructions on back- Lifetime warranty

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Jargon Buster

Acrylic - A type of plastic
GPS - Global Positioning System - Global position using satellites
Paper - A thin sheet mainly used for writing. Available in a variety of colours. Made mainly from wood pulp.
Black - A colour which does not emit any colour of the spectrum. Black absorbs all frequencies of the spectrum.
Plastic - A generic term for a synthetic product used in the manufacture of products
Warranty - A service provided by the retailer or manufacturer to ensure a device works for a period from new
compact - Carefuly designed to ensure an item has a minimal physical size
Small - something that takes up less space than normal.
Compact - something that has a lot combined within a small space.
Parallel - Two objects that run symmetrically alongside each other.
Warranty - A purchasers guarantee from the manufacturer for replacement/fix of goods when faulty.
Adjustable - Something that can be changed or slightly modified to fit.
Width - The measurement of something from one side to the other.
Drawer - A compartment that opened and closes horizontally to store items in, for example stationary in a desk.
Instructions - An informative direction to take.
Design - A drawing or styles that shows the look and functionality of something before its made.
Adjustable - Something that can be changed in order to fit better.
Pocket - A bag shaped insert in clothing used to carry items
Primary - the beginning of something, of chief importance.
Sturdy - something hat is very stable and is solidly built.

Supplier Information

Stanfords
Stanfords was established in 1853 and opened their iconic Covent Garden flagship store in 1901. They have become the top retailer of maps, travel books and accessories in the UK and arguably offer the largest selection of maps and travel books worldwide. Famous names such as Captain Robert Falcon Scott, Ranulph Fiennes and Michael Palin have purchased from Stanfords. They now have a shop in Bristol and both stores together with other venues operate a calendar of events including talks, book signings and exhibitions. As a specialist map retailer, the map selection is comprehensive and includes road maps, street maps and walking maps from worldwide destinations, as well as a selection of world atlases and wall maps. Books include travel guides and travel literature. Stanfords also stock globes, from miniatures made of blue marble to magnificent floor-standing globes. The website features a selection of interesting articles on travel topics.
Page Updated: 2023-11-12 20:15:36

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