THIS IS JUST BASIC FLASHCARDS. NOTHING FANCY OR ADVANCED. IDEAL FOR SOMEONE NEW TO SAILING PRIOR TO PROFESSIONAL INSTRUCTION. Basic sailboat part identification flash cards as well as some terminology. This app is great for someone new to sailing wanting to learn the basic parts and terminology. I built and used this prior to taking a basic sailing class and found it helpful. IF YOU BELIEVE THERE IS AN ERROR PLEASE EMAIL ME. [email protected]