What makes the Portland Course Plotter unique?
• Determines true heading – Helps navigators correct for magnetic variations so they always follow the correct heading.
• Glides smoothly over cards – The molded base with rounded feet prevents resistance.
• Easy to turn – The compass dial with raised fins is designed for easy use, even with cold hands or gloves.
• Durable & Reliable – The brass pivot is lubricated with silicone grease for smooth operation.
• Manual quality control – Each plotter is checked for accuracy during assembly.

Product features:
• Bright blue directional arrow prevents accidental reverse course setting
• Graduated edges for tide calculation and boat speed
• Fixed grid base makes it easy to plot latitude from your GPS
• Includes comprehensive instructions for trouble-free use

• After use, clean with a dry or slightly damp cloth to remove dust and salt deposits.

• Check regularly that the compass disc turns smoothly and is free from dirt.

• Store in a dry place to prevent wear from moisture and salt.

• Use a small amount of silicone grease on the brass pivot if movement becomes stiff.

• Store in a protective cover to prevent scratches and damage.

• Why should I use this plotter if I have a GPS?
The Portland Course Plotter is a reliable backup in case of electronic failure and gives you a hands-on feel for navigation.

• Can I use this plotter without experience?
Yes! The included instructions will help you get started step by step.

• Is the plotter suitable for professional use?
Absolutely. The plotter is used worldwide by instructors and navigation experts.

• What is the difference between true north and magnetic north?
True north is based on the Earth's axis, while magnetic north is influenced by the Earth's magnetic fields. This plotter helps you apply the correct corrections.