Aquaculture Engineering

Practical - 1
Experiment No 1 - Folding and unfolding of chain

Folding and unfolding of chain
Two chain men are required for measuring the length of a line, which is greater than a chain length. The more experienced chainman remains at the zero ends or the rear end of the chain who is called as the follower. The other chainman holding the forward handle is known as the leader.

Unfolding the Chain
To unfold a chain, the chainman keeps both the handles in the left hand and throws the rest of the chain in forward direction with his right hand. The other chainman assists in removing the knots, if any for making it straight.

Folding a Chain
Bring the two halves of the chain so as to make them lie along each other by pulling the chain in the middle. Then, starting from the middle portion take two pairs of links at a time with the right hand and place them obliquely across, with the left hand.