John Calton builds his own 10in touchscreen DIY chartplotter with GPS and AIS for a fraction of the cost of an off-the-shelf system
John Calton
![John Calton](https://keyassets.timeincuk.net/inspirewp/live/wp-content/uploads/sites/19/2023/07/PBO290.prac_plotter.johncalton_reader-200x200.jpg)
John Calton builds his own 10in touchscreen DIY chartplotter with GPS and AIS for a fraction of the cost of an off-the-shelf system