James Stevens answers your questions of seamanship - this month, what should you do when the buoys you see don't match the chart?

Navigate any coastline

Navigation using digital or paper charts is key to good seamanship, but understanding the seven basic types of coastline and their challenges, and keeping your eyes out of the boat…

No matter where you are in the world, if you are cruising a coast the chances are it will fall into one of seven categories, says Rachael Sprot.