Duncan Wells is an RYA instructor and sailing school principal. He has written for many leading boating magazines in the UK and US. He is the author of the bestselling Stress-Free Sailing, Stress-Free Navigation and Stress-Free Motorboating (all published by Adlard Coles), which have helped countless sailors and motorboaters learn trouble-free boating techniques. He lives in Buckinghamshire.

Jonathan Parker worked as operations manager of Sea Start (the AA of the sea), where he attended more than 3,000 callouts. He runs his own boat servicing and repair company, Parker Marine Services. He is a partner in Parker Adams Boat Sales (who lead the way in walk-through videos and drone spectaculars) and Parker Adams Charters. He is an RYA Powerboat Instructor and teaches the RYA Diesel Engine Course. He lives in Hampshire.