Blundell Harling Portland Navigation Plotter

The Portland Plotter is one of the most popular chart work instruments and is widely used by RYA practical and shore based instructors.  It provides a quick method of plotting courses and bearings and gives a direct reading of corrections for magnetic variation. 

Single arm plotter with variation scale for use on small or medium vessels and for instructional use.

• Movable disc enables magnetic variation to be set on the instrument
• Movable arm is divided into millimetres
• Captain Fields' protractor markings
• Comfortably covers the largest Admiralty Chart
• Pencil guide holes give precision location
• Unique design ensures a truly parallel action
• Special “slip and grip” for ease of use
• Manufactured from clear acrylic
• 400mm in length