Portland Course Plotter, Dividers, Speed/Time/Distance
PORTLAND COURSE PLOTTER AND DIVIDERS KIT with SPEED-TIME-DISTANCE SLIDE RULE CALCULATOR for Chartwork and Navigation ideal for RYA training Supplied with a hand-made canvas sleeve to protect your plotter, dividers and calculator DESCRIPTION The classic Portland Plotter is one of the most widely-used tools for na vigation and chartwork aboard yachts and motor cruisers alike. A Portland Plotter will help you to quickly and simply measure bearings on a chart and to plot bearings accurately. The rotating dial provides accuracy to a single degree and can also be used to make calculations involving magnetic variation and deviation much simpler. Instructions are included with clear explanations and illustrations. The plotter is made in the UK from a high-quality clear acrylic with numbers and scales that are easy to read even on a moving boat and in poor light. The solid brass Dividers have a smooth operation which can be adjusted to make them really easy to use for measuring distances quickly and simply.The Speed-Time-Distance slide rule calculator is a really simple-to-use tool for making your chartwork and navigation easier and more accurate. The most common way to use the calculator is to slide the scale until your speed is shown against one of the arrows, then look along the time scale and read off the distance you will travel in that time and at the speed you have chosen. The calculator works just as well being used to work out your speed given a distance travelled and time taken, or use it to find how long it will take to travel a particular distance at your chosen speed. And it does all this without you having to use paper and a pencil or do any sums in your head. A brilliant and handy little tool, the Portland slide rule calculator is made in the UK from tough plastic with clear markings and is completely waterproof. Full instructions are printed on the reverse and you can even use the scale on the back for your astro-navigation too. Also available are two chart pencils that we have chosen so your charts won't be damaged, please select from the options menu above. CONDITION Brand new and unused. The plotter, dividers and slide rule calculator will be supplied in the original manufacturer's packaging with full instructions included. A canvas sleeve is supplied with each plotter and is available in a range of colours. Each sleeve is hand-made in the UK from a tough canvas and will protect your plotter from scuffs and scratches, as well as looking smart on your desk or chart table. Each sleeve has storage for one plotter, a pair of dividers and one slide rule calculator. Please select the colour you would like when making your purchase. RECOMMENDATION I have been using the Portland Plotter, dividers and slide rule calculator with my students on Royal Yachting Association (RYA) Day Skipper and Yachtmaster courses for many years and the Portland Plotter and Dividers kit is used at RYA training centres around the world. My students have always found them easy to use and robust enough for use afloat as well as ashore. I will only sell products that I have personally tried and tested and can recommend. QUESTIONS I am very happy to take questions. Thank you for looking. Russ Coxon RYA Yachtmaster Instructor and Examiner RYA Powerboat Trainer