CIRCULAR COMPASS PROTRACTORS

BN3 - 3-1/2" Compass Rose - 10-1/2" Arm
Transparent protractor with transparent arm attached to compass rose.
Transparency allows positions and depths to remain in view.
usually ships within 24 hours

BN5 COMPASS COURSE PROTRACTOR

6¾" Transparent Base with grid and compass rose.
21" Transparent Arm, scaled in miles for use with coastal and harbor charts 1/20,000, 1/40,000 and 1/80,000.
Arm extended on the short end to read reverse course.

Out of Stock

BN10 COMPASS PROTRACTOR w/STRING

5" Square with string attached for direction finding.
Used to find true course, correct true north to magnetic course,
determine ground speed, or to lay off course in time intervals.
May also be used to measure mileage on sectional charts and regional charts.
Ideal for hikers, hunters, boaters, or pilots.
Quick and easy determination of course, in a handy pocket size.
usually ships within 24 hours

CIRCULAR and SEMI-CIRCULAR PROTRACTORS

BN16 - 3-1/2" Semi-Circular - Student Model - Scale in Degrees
BN62 - 6" Semi-Circular - Scale in 1/2 degrees
BN63 - 6" Circular - Scale in Degrees

usually ships within 24 hours

BN20 COURSE PROTRACTOR PLOTTER

Measures 4" x 15".
Designed to measure a course or bearing from a given point by moving a line
parallel to itself or plotting celestial lines of position.
Printed in two colors for quick selection of necessary points and scales.
Calibrated in degrees, nautical miles 1/40,000 and 1/80,000,
and also in statute miles 1/40,000 and 1/80,000.
Instructions included.
usually ships within 24 hours

BN41 NAUTICAL PLOTTER w/ARM

Measures 5" x 17¼".
Strong transparent plastic.
For plotting of courses and bearings using direct readings against a variation scale.
Ideal for use on small navigation tables.
Precision divided degrees and guide lines.
Built-in variation scale eliminates a step in your calculations, allowing less chance for errors.
Instructions included.
usually ships within 24 hours

BN43 NAUTICAL PLOTTER (circle type)

5" Diameter Compass rose.
15" Arm.
Strong Transparent plastic.
For plotting of courses and bearings using direct readings against a variation scale.
Matte surface can be written on with a pencil.
Mile and kilometer scale along the edge.
Built-in variation scale eliminates a step in your calculations, allowing less chance for errors.
Instructions included.
usually ships within 24 hours

BN51 MARINE TRIANGLE

Heavy gauge triangle with handle for easy pickup and positioning.
Triangle incorporates a centimeter scale calibrated in tenths and a protractor
usually ships within 24 hours

BN61 COCKPIT PLOTTER KIT

The essential tool for accurate, rapid plotting of courses, bearings or positions.
5" x 5" square. Comes with Vinyl Case, T-S-D Ruler and instructions.
Can be used on all scales of charts or maps based on true north, and even on folded charts with no compass rose visible.
Two-color degree markings (black clockwise, red counter-clockwise).
Ruler edges highlighted in red.
Use on small navigation stations, aircraft cockpit, or even on your lap.
Find a course.
Plot a bearing, course or line of position.
Plot a reciprocal course.
Determine a direction, course or bearing.
Transfer a course or bearing.
Plot your position from 2 or 3 bearings.
Plot your position from horizontal sextant angles.
usually ships within 24 hours

BN103 PORTLAND COURSE PLOTTER

An advance on all current designs utilizing practical user experience and manufacturing technology.
Measures 14" x 5".
Precision molded using water clear high impact acrylic material.
Instruction leaflet included, covering all possible uses.
Lifting knob is provided, and bars to turn the compass disc.
Handling is easy, even with gloved hands.
Day-glow green directional arrow prevents accidental reciprocal bearings.
Edges are graduated for tide and boat speed.
Base has a fixed grid so the course plotter can be used to easily plot lat/longs from a GPS system.

BN107 PORTLAND GPS PLOTTER

Quickly determines latitudes and longitudes when fixing GPS waypoints on your chart.
Operates like a parallel rule, without "crabbing" off the chart.
Fast, simple and extremely durable.

BN109 PORTLAND 10" SQUARE PROTRACTOR

Douglas type square pattern navigational protractor
Can also be used as a simple parallel rule and plotter.
10" x 10" square, and supplied with full instructions for use.

BN112 PORTLAND TRIANGLE

Made from acrylic with lifting handle.
Protractor markings and compass points with reciprocals in red and a scale of millimeters.
Use to lay off bearings using any convenient meridian on a chart as a datum.
First 180º in black - second 180º - 360º in red.
In pairs there are often used as a parallel rule.