See http://www.sunsail.com/tips/pickingup.html now.

Welcome back!

That's how not to moor up an 80 tonne boat in a flowing river, where you find five knots of current

There is only one proper way to moor KJ. to a River Thames Buoy with a large ring at the top.

AND  WE  ARE  NOT  DOING  IT  THE  CORRECT  WAY  ON  KJ  JUST  YET

 The PRIMARY MOORING LINE must be prepared beforehand, but then so does everything.

Take a slender line such as a heaving line or similar. 

Tie its end to the end of the PRIMARY MOORING LINE 

 so the two warps line along each other and the ends face away. 

Catch the knot now made,  in head of the FIRST BOAT-HOOK, with the ends of the warps pointing away. At the appropriate moment , and from an appropriate position, drive the head of the FIRST BOAT-HOOK and both lines through the eye. 

Deploy the SECOND BOAT-HOOK to catch the knot beyond the eye-of-the-bouy and relieve the FIRST BOAT-HOOK.

Pull the PRIMARY MOORING LINE with its attendent thin line back on board.

Undo the knot, reserve the thin line for the moment and make the PRIMARY MOORING LINE fast to the boat.

Tie the thin line to a SECOND MOORING LINE  so the ends face each other.

Go to the other end of the thin line and gently haul the SECOND MOORING LINE through the eye of the bouy in the opposite direction to the way the FIRST MOORING LINE travelled and haul away until the end of the SECOND MOORING LINE arrives back on board.

Undo the thin line and secure the SECOND MOORING LINE to the boat.

DISMANTLATURE IS A REVERSAL OF THE MANTLATURE PROCEDURE