Yacht Navigation - how to be safe in the digital world

Digital navigation should be safe, but there are still ways to get it wrong.
The traditional approach is to have the navigator at the chart table, but this causes accidents if he is asleep or on deck. It's much safer to have a chartplotter by the wheel, and have a second person navigating to avoid mistakes or inattention.
Gps gives our position within a few metres, but the charts are not so accurate. Wide scale charts are often out of position, because they have not been updated. Always zoom in to be safe! Also, watch out for chart offset, where the positions of hazards does not match the gps.
Never sail close to an obstruction unless you can confirm its position with your eyes or radar at night.
Many thanks to the video scenes:-
The Race of my Life - Greenings grounding. • The Race of my Life - ...
The Ocean Race - Vestas Wind crash. • Race Yacht Crash Caugh...
Thanks to the Volvo Ocean Race for publishing this video, and the accident report - it makes us all safer.
Practical Navigator - sextant. • Getting Started in Cel...
Practical Navigator - Calculations. • Going Further in Celes...