Portland Navigational Triangle 230mm
Features protractor markings and compass points with reciprocals in red
Scale in millimetres
Manufactured from strong acrylic
Portland Navigational Triangle 230mm
Features protractor markings and compass points with reciprocals in red
Scale in millimetres
Manufactured from strong acrylic
Can be used in pairs as a Parallel Rule
Also available in 230mm
Divided with protractor markings (double reading) and compass points
Manufactured from high quality 6mm acrylic
Bevelled on all four edges with solid brass links
All other metallic parts are manufactured from non-corrosive materials
Rubber pads are fitted to the underside to prevent slipping
Divided with protractor markings (double reading) and compass points
Manufactured from high quality 6mm acrylic
Bevelled on all four edges with solid brass links
All other metallic parts are manufactured from non-corrosive materials
Rubber pads are fitted to the underside to prevent slipping
The Portland Course Plotter
Used worldwide by practical and shore based instructors
Bright blue directional arrow prevents accidental reciprocal bearings
Edges are graduated for tide and boat speed
Base has a fixed grid so it is easy to plot latitude from your GPS system
Comprehensive instructions included