Our instruments provide a practical facility for plotting electronic data onto charts and are essential as a backup in the event of equipment failure. The new Portland Course Plotter is an advance on all current designs. A bright green directional arrow prevents accidental reciprocal bearings. Edges are graduated for tide and boat speed. In addition to normal traditional navigation requirements, the Course Plotter is ideal for constructing instant tidal vectors using the Tidal 2000 System.
Comprehensive instructions cover all possible uses.
The Douglas type square pattern navigational protractor, which can also be used as a simple parallel rule and plotter. Available in 125mm and 250mm and supplied with full instructions. This triangle has protractor markings and compass points with reciprocals in red and a scale of millimetres. This is an inexpensive instrument for the classroom. It has rigid aluminium links.