There has been data ("Yachtmaster Exercises for Sail and Power: Questions and Answers for the RYA Yachtmaster(r) Certificates of Competence - ISBN-13 978-1-4081-8324-3") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Sat Mar 7 20:50:41 2020, so the data displayed here has been removed .