Premium navigation tools · since 1928
Weems & Plath.
Precision at the chart table.
Magnifiers that bring the details closer. Dividers made for hands-on chart work. Rules for plotting courses and bearings. Explore thoughtfully designed tools for paper charts and traditional navigation.
Small details. A closer look.
Three ways to see your chart more clearly.
Choose a large acrylic chart magnifier, a smaller crystal-glass model or a brass-ring magnifier chart weight. Their magnification, size and materials suit different preferences, from everyday chart reading to a gift for a chart enthusiast.
6× · acrylic · Ø 10.16 cm
Grande View 615
The large dome magnifier gathers ambient light over the reading surface. Place it directly on the chart, with no focusing required. Supplied in a felt-lined gift box.
4× · crystal glass · compass rose
Crystal Magnifier 515
A smaller crystal-glass alternative with a compass rose on the base. For reading chart details or adding a nautical touch to a desk.
5× · brass ring · Ø 7.62 cm
Magnifier chart weight 412M
A magnifying lens surrounded by brushed, lacquered brass. The felt-lined base protects the surface. Combines a chart weight and magnifier in one tool.
The compass rose on models 515 and 615 is a degree scale, not a magnetic compass.
Brass. Mechanics. Chart work.
Tools you will enjoy working with.
The choice is a practical one: the grip of a one-hand divider, the movement of a parallel rule and the view through clear blades. These are two classic choices for the chart table.
17.8 cm · brass & stainless steel
7″ one-hand divider
Opens and closes with one hand, leaving the other free for the chart or rule. For measuring and transferring distances on a nautical chart.
38.1 cm · clear acrylic blades
15″ brass-arm parallel rule
Clear acrylic blades with a degree scale and brass arms. Used to transfer a direction parallel between a course line and the chart’s compass rose.
From course line to passage plan
Build your chart-work toolkit.
The range also includes aluminium parallel rules, compact plotters, protractor triangles and writing tools. Choose a size and working method that fit your chart table and the tools you already use.
7¼″ · 18.4 cm · locking function
ParaLock Plotter
A compact plotter with a locking knob to hold the rules at the selected opening. An option when you prefer a short chart-work tool.
Approx. 28 cm · handle · inch scale
Protractor Triangle
A protractor triangle for courses and angles. Can be used with a matching triangle to transfer lines in parallel. Sold individually.
Navigation-tool storage
Navitote
Keep dividers, rules, plotters and pencils together between trips. Useful for taking your chart-work tools to a navigation class.
Choose by task
What do you need for chart work?
Read the details
A chart magnifier helps you read small numbers, symbols and text. Consider physical size as well as magnification: Grande View 615 is 6×, Crystal 515 is 4× and the brass 412M model is 5×.
Measure distances
Dividers transfer distances between points and the chart’s distance scale. A one-hand model is useful when you want to hold the chart or rule with your other hand.
Plot and transfer courses
A parallel rule transfers a direction without changing its angle. Plotters and protractor triangles offer alternative working methods. Add suitable pencils and storage to complete the toolkit.
Weems & Plath · 1928
A history in navigation.
Weems & Plath has supplied nautical instruments since 1928. Rooted in traditional navigation, the brand now offers a broad range of chart-table tools. At Kart.no, we bring together chart magnifiers, dividers, parallel rules and accessories for people who appreciate tactile materials and practical function, on board, in class or planning at home.
Shop · Weems & Plath
Find your next navigation tool.
Explore our Weems & Plath range: chart magnifiers, dividers, rules, plotters, pencils and navigation aids. Check each product page for current availability.
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In stock
Star Finder U.S. Pub. 2102-D
134,56 € Add to cart -
Low stock
Weems & Plath Protractor Triangle, 28 cm nautical protractor
42,24 € Add to cart -
In stock
Weems & Plath VEC Vecta Rose – Self-adhesive compass rose for nautical charts (6 pcs)
19,16 € Add to cart -
In stock
Weems & Plath Brass passer 7″ (18 cm)
57,62 € Add to cart -
In stock
Weems & Plath Crystal magnifier 4× with compass rose
99,63 € Add to cart -
NewIn stock
Weems & Plath Grande View 615 – 6× chart magnifier with compass rose
191,95 € Add to cart -
In stock
Weems & Plath LIGHTRule™ navigation light guide
57,62 € Add to cart -
In stock
Weems & Plath Magnifier Chart Weight 412M – brass, 5×
107,32 € Add to cart -
In stock
Weems & Plath Nautical pencil
30,70 € Add to cart -
In stock
Weems & Plath Nautical Slide Rule
45,78 € Add to cart -
In stock
Weems & Plath Navigation tool bag
44,62 € Add to cart -
In stock
Weems & Plath One-Hand Divider 7″ (17.8 cm) – brass
84,24 € Add to cart -
In stock
Weems & Plath Parallel ruler 15″ (38,1 cm) in brass
65,32 € Add to cart -
Made to order
Weems & Plath Parallel ruler 15″ (38.1 cm) in aluminum
49,93 € Add to cart -
In stock
Weems & Plath Parallel ruler 18″ (45,7 cm) – aluminum
63,78 € Add to cart -
Low stock
Weems & Plath ParaLock Plotter 7 ¼” (18,4 cm)
48,47 € Add to cart -
In stock
Weems & Plath Pencils with pencil sharpener
19,16 € Add to cart -
In stock
Weems & Plath Straight Pattern Passer 8″ (20,3 cm)
73,01 € Add to cart -
In stock
Weems & Platt Nautical pencil – Refill (12 pcs)
6,85 € Add to cart
Before you choose
Questions about the tools
Which chart magnifier should I choose?
Choose Grande View 615 for the large acrylic model with 6× magnification. Crystal Magnifier 515 is the smaller crystal-glass alternative with 4×. Model 412M combines a 5× lens with a brass ring and felt-lined base. See the product pages for dimensions and details.
Is the parallel rule made entirely of brass?
The 15-inch brass-arm model has brass linkage arms and clear acrylic blades. The name refers to its brass arms. The range also includes models with aluminium arms.
Are these tools suitable for navigation classes?
Dividers, parallel rules, plotters and protractor triangles are used when learning chart work. Check your instructor’s equipment list before choosing a model and size; some courses require particular tools or a pair of matching triangles.
Do you stock other Weems & Plath navigation aids?
Yes. Our range includes nautical pencils and refills, Vecta Rose self-adhesive compass roses, Nautical Slide Rule, LIGHTRule and Star Finder. Browse them in the product collection above.