Six pictures, sixty seconds. Recognising a knot is the half of the skill nobody teaches you — your skipper will point at something and say "put a clove hitch on that" and expect you to know what it should look like when it's done.
This quiz needs JavaScript. The six illustrated knot guides are plain text and always free to read.
Guides first, quiz second: work through the knot hub and come back.
The course drills you until the knot comes out of your hands without thinking — 10 modules, 330+ cards, and a rank that grows from Turista to Capitán.