Discover the complete range of Blundell Harling marine navigation instruments — premium British-made chart tools designed for accurate chart work on yachts, sailboats, powerboats, and commercial vessels. Blundell Harling (based in Portland, Dorset) has been a trusted name in marine plotting equipment for decades, offering reliable, user-friendly instruments that simplify course plotting, bearing transfer, distance calculations, and tidal planning. Key highlights include:
- Portland Course Plotter (best-selling rotary plotter with movable disc for quick magnetic variation correction, direct course/bearing readings, and grid for latitude plotting from GPS)
- Portland Course Plotter and Divider Kit (complete set with plotter and brass dividers for comprehensive chart work)
- Portland Navigational Plotter (advanced version with enhanced scales and features)
- Parallel Rules (e.g., Captain Field's Pattern – traditional brass/acrylic rules for transferring bearings accurately)
- Dividers (brass single-handed or straight dividers for measuring distances on charts)
- Speed-Time-Distance Calculator (NATO-pattern slide rule for quick calculations of speed, time, or distance)
All Blundell Harling instruments feature clear markings, robust construction (often in acrylic/brass), comprehensive instructions (including RYA-approved guides), and compatibility with standard nautical charts. Ideal for RYA training, coastal navigation, passage planning, or professional use — shop genuine Blundell Harling chart plotters, rules, dividers, and calculators with UK & worldwide delivery from Marine Compasses UK.















