What is meaning of blockage factor of ships?

The blockage factor is defined as the immersed cross-section of the ship’s mid-ship section divided by the cross-section of water within the canal or river.

Blockage Factor = ( proportion of a midship’s section of ship / cross sectional area of the channel, river or canal)


When two ships are passing in the channel the blockage factor is increased and the value of squat experienced can expect to nearly double.


Leave a Comment