Not looking at the video so I may be missing what's up but if you have a single block at the top - like a halyard - with the fall attached to your harness or chair, then someone at deck hauling you up has no mechanical advantage and must lift your whole weight. If you, sitting in the chair, have the hoist in hand to pull yourself up, half your weight is in your hands while the other half is in the seat - giving you a 2:1 advantage.
Postition is everything.
G'luck
|