Chart Plotters, Parallel Rulers and Chart Table Equipment.


  • RYA Handy Plotter
  • Weems Vectormaster
  • Weems Protractor/ Compass Rose
  • Weems Plotter Pack
  • The Plotter Pack with Handy Plotter
  • The Compass-rose Demonstrator
  • Portland Speed-Time-Distance Calculator
  • Presentation Set Dividers and Parallel Rule
  • Ultralight Divider/Compass
  • Straight Brass Dividers
  • Single-handed Brass Dividers
  • Student Divider/Compass
  • Compass Linex 150mm
  • Compass Linex 200mm
  • Linex Parallel Rulers with Captain Field's Graduations
  • Plain Parallel Rulers
  • Douglas Square Protractor
  • Nautical Protractor - 320mm Diagonal
  • Nautical Protractor - 280mm Diagonal
  • Nautical Slide Rule (Weems & Plath)
  • Buy on line using our secure pages, by clicking on the buttons below each review

    If you have any questions or want a quote for delivery email us.



    RYA HANDY PLOTTER
    Size 293mm x 132mm.
    Ideal for chart plotting, this plotter is a handy size, perfect for the smaller chart table and is made from a thick, flexible and durable plastic.

    NZ$27.50 + delivery.

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    WEEMS VECTORMASTER
    Diameter. 180MM X 180MM

    Given the position of a storm and direction and speed of its advance, with the aid of your Vectormaster you may quickly determine a course which will put maximum distance between your vessel and an oncoming storm. This circular slide rule provides for the solution of time, speed and distance, fuel consumption, conversions, multiplication, and division.

    The face of the Vectormaster permits the rapid solution of problems involving vectors, such as those encountered in current sailing, determination of true wind direction and force, and apparent wind to be expected on other headings.

    NZ$65.00 + delivery.

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    WEEMS PROTRACTOR / COMPASS ROSE
    Size 390mm x 130mm.
    The Weems Protractor performs 6 different functions: laying off a course; laying off a bearing; measuring distance between any two points; plotting your position on a chart from a given set of coordinates; determining the coordinates of a position on a chart; and Loran C interpolation.

    It is an updated version of the French origin 'Breton' plotter.

    Supplied in plastic wallet with attached pencil and pencil sharpener.

    NZ$45.00 + delivery.

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    WEEMS PLOTTER PACK.

    The Weems protractor/Compass Rose Plotter Pack is great value. Each pack contains the Weems Protractor/Compass Rose Plotter (length 400mm width 130mm), 2B Chart pencil, Eraser, Pencil Sharpener, Douglas Square Protractor, Divider and plotting hints booklet, all contained within the sturdy permanent storage wallet. The items themselves have their own pocket within the pack for ease of storage. Ideal for the chart table.

    NZ$59.50 + delivery.

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    THE PLOTTER PACK WITH HANDY PLOTTER.

    We believe that this kit is the best value added product in the Instruments page. It consists of the Handy Plotter, the Divider/Pencil Compass, a 120 mm Douglas Square protractor, a 2B plotting pencil, eraser and sharpener, and a booklet on plotting. The pack is contained in a permanent wallet, which is strong, clear, document safe and cold proof. Each item has its own pocket. Including the wallet and booklet the retail price of the Plotter Pack represents a considerable saving compares to the full retail value of the contents. It has appeal for students, present givers and boaties setting up a chart table.

    NZ$49.50 + delivery.

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    Click to see details of the Demonstrator.
    THE COMPASS-ROSE DEMONSTRATOR
    Length 600mm, width 165mm.
    This is our own design and is designed specifically to act as a classroom aid for teaching the use of plotters similar to the Compass-rose Plotter.
    The contrasting and high visibility colours, and the large print of the scales on the base-plate and the Compass-rose disc allow the grids and digits to be read from the back of a normal sized classroom. The scales are simplified and enlarged versions of those used on the Compass-rose, plotter as described earlier on this page. However, the Compass-rose Demonstrator has a generic form and graduation that will make it an excellent tool for teaching the single-arm protractor in all of its various guises.
    The advantages of the Demonstrator as an on-board chart plotting tool should not be overlooked. The reading accuracy is in no way diminished through its primary function as a classroom aid. It easily spans a standard sized chart and the clarity of the enlarged graduations make it very easy to read in poor light.
    It is supplied with the same comprehensive instructions as the Compass-rose Plotter.

    NZ$46.00 + delivery.

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    SPEED-TIME-DISTANCE CALCULATOR.
    This is a very handy little tool, either for the chart table or classroom. The Portland Speed-Distance-Time calculator allows you to quickly and easily work out unknown information. For example- When speed is known you can find the time required to run a given distance, or distance run in a given time. Find the speed made good, periods between 15secs and 4 days.

  • Simple to use Slide Rule
  • calculates the third variable given the other two (distance covered, given speed, elapsed time)
  • Outer sleeve manufactured from high Impact plastic
  • length 170mm

    NZ$25.00 + delivery.

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    PRESENTATION SET DIVIDERS, PARALLEL RULE AND COMPASS
    This trio of top-of-the-line nautical instruments are packed in a wooden presentation case with brass hinges and case locks. The set is produced for the US company C Plath who are world famous for top quality chart table equipment.
    Both dividers and graduated parallel rulers are of brass and are fully functional chart plotting instruments that all mariners would be proud to own and use for everyday chart navigation. The compass is very sturdily made and is balanced so as to be fully functional in all latitudes and both north and south hemispheres.

    NZ$275.00 + delivery.

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    ULTRALIGHT DIVIDER/COMPASS.
    Leg length 175mm (7 inches), weight .09Kms (3 oz) These robustly built dividers weigh only 3 oz. and are bulkier than standard brass single-handed and plain dividers. They are made in Germany of a coated marine alloy to be corrosion resistant. Gear-synchronised arms allow one handed use and the shape of the arms provides excellent point alignment. The center wheel and extension-bar construction allows for fast action; the coarse worm allows easy manipulation whilst the dividers will hold their span during practical use at the chart table. The Ultralight divider/compass features hardened stainless steel points and a replaceable point-to-pencil lead alternative, and thus it becomes a navigator's chart compass.

    NZ$44.00 + delivery.

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    STRAIGHT BRASS DIVIDERS.

    Plain Dividers. Made of brass and stainless steel. Leg length 170 mm from hinge to tip. Weight 0.09kg

    NZ$45.00 + delivery.

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    SINGLE HANDED BRASS DIVIDERS.

    This is a classic product, to be found on every well-equipped chart table. They are made of brass and other non-ferrous materials; the bow at the top allows the user to open and close the dividers after the manner of using chopsticks. The size specified (eg. 175 mm) is the leg radius from hinge to tip.

    NZ$45.00 + delivery.

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    DIVIDER/COMPASS, student quality. 120 mm.
    It is a standard pencil compass, with a stainless steel point provided as an alternative to the lead. The instrument is packed in the divider mode, in its own wallet with two 2B leads in a plastic capsule; it is intended as a low cost alternative for chartwork students. In a marine environment is probably best kept in the pencil compass mode (thus giving it a relatively dry life!).

    NZ$17.50 + delivery.

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    Also available in 150mm and 200mm with two stainless steel points.


    LINEX DIVIDERS. 150 mm.

    NZ$20.00 + delivery.

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    LINEX DIVIDERS. 200 mm.

    NZ$25.00 + delivery.

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    LINEX PARALLEL RULER WITH CAPTAIN FIELD'S GRADUATIONS
    These emulate top-of-the-line professional parallel rulers, as would be found in the hands of many professional ships officers today.
    The Captain Fields scale can best be described as starting life as a 360 protractor, subsequently folded in half along the N/S axis and elongated to fit the length of the ruler. The scale is used against a meridian of longitude to read direction in degrees true; this eliminates the need to walk all the way to the compass rose.
    The scale print on the ruler is much larger, and can be read with greater precision than the compass rose as printed on the chart. Few non-professionals are taught to use a Captain Fields scale, yet it is a very big improvement on the charted rose. Our rulers have a sheet giving directions on how to use the Captain Fields scale.

    As shown - 380mm. Fitted with aluminium arms.

    NZ$46.00 + delivery.

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    As shown - 455mm. Fitted with aluminium arms.

    NZ$66.50 + delivery.

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    As shown - 535mm. Fitted with aluminium arms.

    NZ$70.00 + delivery.

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    As shown - 605mm. Fitted with aluminium arms.

    NZ$77.00 + delivery.

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    The 380mm parallel ruler is also available with brass arms - As illustrated as part of the presentation set above. They are without doubt the Rolls Royce of traditional chart-plotting instruments.

    NZ$56.50 + delivery.

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    Captain Fields Instructions click here if you would like to download a set of graduated parallel ruler instructions. It is a Word document using MS Office97 and is only 62.5 Kb.



    PLAIN PARALLEL RULERS, 380mm.

    These are ungraduated for the sake of economy. The 380 mm version suits most chart tables and desk tops, and is by far the most popular.

    NZ$39.50 + delivery.

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    DOUGLAS SQUARE PROTRACTOR, 120 mm (for picture - see above).
    This is a 360 protractor on a square, clear plastic base. In chartwork it can be used to plot direction from a meridian of longitude. It is most functional, however, in its use for plain paper plotting; eg. as a plotter for celestial position lines or radar targets. Larger squares, up to 300 mm, are available but are very expensive; in our experience the 120 mm version meets all normal needs. Customers for a large square could be well advised to consider the 390 mm sided Compass-rose Plotter as a very much cheaper and more utilitarian alternative.
    The Compass-rose Plotter has similarities in application to the Douglas square.

    NZ$5.00 + delivery.

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    NAUTICAL PROTRACTOR.
    This is a 360 protractor on a triangular, clear plastic base. Sometimes called "navigational squares" they are usually used as a pair, sliding one against the other across the chart. They are popular in Europe, Asia and in the USA where they replace the parallel ruler, more common on British and Commonwealth vessels.
    Prices given here are for single units; if a pair is wanted please order two. Two sizes are available:

    Larger size - 320mm along the diagonal.

    NZ$25.00 + delivery.

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    Smaller size - 280mm along the diagonal.

    NZ$20.00 + delivery.

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    NAUTICAL SLIDE RULE.
    The Nautical Slide Rule consists of two circular dials mounted on a plastic base and is used to easily find speed, time or distance when two out of the three are known. For example, you can find your speed when you know time and distance or you can find out how far you have travelled when speed per hour is known or you can find out how long it will take to travel a certain distance at a known speed.

    NZ$46.00 + delivery.

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