Blundell Harling – Made in the UK Portland Single Arm Plotter for chartwork and navigation. A simple system to add Variation or deviation onto a course plot. 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 loction Unique design ensures a truly parallel action Special “slip and grip” for ease of use Manufactured from clear acrylic 400mm in length
