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You can't learn a knot from a single drawing. In Marine Knots App the rope ties itself in front of you in 3D: step by step, at your own pace and from every side. Turn the model freely through a full 360° with your finger, pause the animation, go back a step and watch where the end goes until the knot pulls tight. KNOTS IN 3D 50 sailing knots, 3 to 7 steps each, 232 steps in all. Scrub through the step bar with your finger, set the speed from 0.5× to 2× and replay the whole knot from the start with one tap. The last step shows the knot being tightened. In full screen, portrait or landscape, only the rope and the step controls remain. Left-handed mode shows every knot mirrored. TWO ROPES, TWO COLOURS In knots tied with two ropes each rope has its own colour and a legend on the stage, so you see at once which one goes over and which goes under. 7 GROUPS Stoppers, loops, bends, hitches & mooring, friction hitches, line handling and bosun's work. 18 basics every sailor knows by heart, and 32 more: from Bowline, Cleat hitch and Clove hitch to Zeppelin bend, Monkey's fist and Turk's head. Hitches are tied on deck gear in 3D: on a cleat, a bollard, a post, a stanchion and an anchor ring. Every knot comes with what it's for, tips and what to watch out for. ROPES 5 rope constructions in 3D that you can turn freely: three-strand rope, eight-plait rope, double braid, Dyneema core in a cover and 12-strand single braid. Cut the rope, show the core or unlay the end, and see what it's good for, with its pros and cons. Compare up to three of 6 materials, from polyester to Dyneema, and read how to look after your ropes. MOORING LINES A plan of a yacht lying alongside a quay. Swipe through the mooring lines, springs and breast lines cards and the right lines light up on the plan. Underneath: what each one stops and which knots you make it fast with. GEAR 29 pieces of deck gear in 3D, in 5 groups: connectors, belaying, line leads, deck and safety, and anchors. Turn every model through 360° with your finger. Shackles, snap hooks, cleats, blocks, a winch, fenders and 6 types of anchor, each with a description: what it's for, where it is on a yacht and how to use it. TERMS An illustrated glossary: working end, standing part, bight, loop, turn, round turn and the other words used in the instructions. LEARNING The start screen shows the knot of the day in 3D and your progress. Mark knots as learned or as favourites, and set a practice reminder for the days and time you choose. WORKS OFFLINE No account, no ads, no tracking. Knots, ropes and gear work offline, and your progress stays on your device. 12 LANGUAGES English, Danish, Finnish, French, German, Greek, Italian, Norwegian, Polish, Portuguese, Spanish and Swedish. The app follows your device language; you can change it in Settings. Knot names stay in English in every language. WHO IT'S FOR For students preparing for a sailing licence, for crews before a passage, for instructors and for anyone who wants to tie knots with confidence and without thinking twice.