The blade tip makes initial contact with the water on the left side. The paddle is angled steeply forward at this moment.
2(L) · Pull
The entire propulsive surface of the blade is immersed in the water on the left side. The paddle is nearly vertical, maximum force is applied.
3(L) · Exit
The last moment the full blade surface is in contact with the water on the left side. The paddle begins to leave the water at the hip.
4(L) · Aerial
The last moment the blade tip is in contact with the water on the left side. The paddle is swinging through the air to the right side.
1(R) · Entry
The blade tip makes initial contact with the water on the right side. The paddle is angled steeply forward at this moment.
2(R) · Pull
The entire propulsive surface of the blade is immersed in the water on the right side. The paddle is nearly vertical, maximum force is applied.
3(R) · Exit
The last moment the full blade surface is in contact with the water on the right side. The paddle begins to leave the water at the hip.
4(R) · Aerial
The last moment the blade tip is in contact with the water on the right side. The paddle is swinging through the air to the left side.
How to Annotate
Each tempo segment contains ~40–60 frames. You must identify and label
exactly 8 key frames — one per phase event — in the correct
sequence: L·Entry → L·Pull → L·Exit → L·Aerial → R·Entry → R·Pull → R·Exit → R·Aerial.
Navigate freely through all frames using A / D or the arrow keys.
When you find the frame that best represents a phase event, press the corresponding
key to label it. The tool will not advance to the next tempo until the sequence is
valid. You can re-label any frame at any time.
The required annotation sequence is not satisfied. Fix the issues below before advancing.
Required: L·Entry → L·Pull → L·Exit → L·Aerial → R·Entry → R·Pull → R·Exit → R·Aerial
(8 frames, picked freely from the tempo, assigned in this order by frame index)
