Push tack

Here's a picture series from a boom cam video where Andy demonstrates the push tack in light winds:

Start sailing switch stance. Note that the front foot is pointing forward.

The first part of the sail move is done only with the mast hand, so let go of the clew hand.

Push the sail towards the back of the board with the mast hand.

On a big board like here, the front foot steps before the mast. On small boards, the front foot can remain behind the mast.

When the sail is all the way back, switch hands: grab the boom with the clew hand, and let go of the mast hand.

Push the sail further back with the clew hand. The sail remains neutral, so the mast will swing to the leeward side.

When the sail is all the way back, push gently with the mast hand.

Look forward and keep pushing with the mast hand. You are backwinded, so you heels are on the center line, and the windward rail is dug in by putting pressure on the toes.

Almost done with the turn.

Stabilize and sail away clew first.

Or, use the short version:

1. Push with the mast hand.
2. Push with the clew hand.
3. Push with the mast hand.

Pushing with just one hand is the key (just like in the heli tack). If you push with both hands, chances are pretty good that the sail with load up with power and throw you off.

Here's the video that the pictures were taken from: