The Duck Tack step by step: head up in switch stance, throw the sail forward, pull the clew through, change sides – with timing tips and error patterns.
What is a Duck Tack? A quick tack in which you head up to windward in switch stance (riding with feet "the other way round") and dive under the clew to the other side of the sail [1][2]. The sail is not walked around the mast but ducked, i.e. pushed flat through the wind in front of you [1].
The honest answer on difficulty: the skill catalogue lists the Duck Tack as intermediate; Dailydose rates it level 5 of 6, placing it more in the pro range [2], and Royn Bartholdi writes: timing and precision are critical with very little room for error [1]. If you have never tried the move, begin on land. There is no shortcut, only patient training.
The move trains exactly what you need later for freestyle: switch stance and sail handling under load.
Where the skill sits in your learning chain: the Duck Tack is the bridge from the normal tack to the freestyle tack. It combines switch stance, heading up and ducking the sail in one move. If you can do it, you understand how the sail can run through the wind without you having to walk around the mast. That is a different way of thinking than in the basic tack.
Expect many attempts to fail before one works. Royn Bartholdi gives an honest hint: if the sail blows into your face, it is usually one of four things, namely not heading up enough, throwing too vertical, hands too slow or clew pulled wrongly [1]. That is a good error list to tick off.
Sail a beam reach, unhook and step out of the straps [1].
Turn your body into the wind and shuffle your feet: feet slightly over the centreline, the front foot near the mast and pointing slightly towards the nose [1].
Milestone: you sail switch stance stably for 10 seconds without hanging on the sail. Royn: legs bent, balance over the feet, not over the sail [1].
Head up by pressuring the windward rail while your body stays over the board, not over the water. Extend your arms forward into the wind: the back hand throws the sail, the front hand guides. The front hand lets go of the boom and grabs the boom end near the clew. Your arms briefly cross [1].
Let the clew pass by your head, let go with the back hand and pull the clew back and down towards the tail with determination. Down means into the wind, because the clew must reach the water faster than the mast so the sail floats [1].
Let go, the sail floats in front of you, and you step forward with the front foot. Reach for the boom as close to the mast as possible while the board stalls in the eye of the wind. Push out with the clew hand and stiffen the back leg so the board turns into the wind. Once the nose is in or near the wind you pull the rig upright and sheet in with the clew; pressure the front foot so the nose continues into the new direction [1].
Milestone: you manage the Duck Tack drifting in light wind before you try it planing.
Royn advises: practise the ducking of the sail on land to learn the handwork [1]. If your hands know the sequence, on the water you only need timing.
A quick tack in which you head up to windward and dive under the clew to the other side of the sail. It is sailed in switch stance [2].
Dailydose gives level 5 of 6 [2]. Royn stresses that timing and precision are critical [1].
It is being backwinded because you throw it too steeply forward and down or push it up on release. Keep your hands close to the body [1].
Yes, Royn explicitly recommends it to learn the handwork [1].
The Clew-First Gybe in Windsurfing: Exit the Turn Clew Leading