SHIP HANDLING IN RESTRICTED WATERS - BANK EFFECT & INTERACTI

Code No: 748

Video Running Time: 31 minutes

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In restricted waters where the navigable width of passage is limited, ships are obliged to navigate close to the shore and close to manmade structures such as banks, quays or bridge piers. During such passages ships have to pass by or run in the same direction as other ships while keeping minimum searoom from each other.

This video highlights the effects that these passages can impose on a ship's manoeuvring characteristics. When entering shallow water and having to pass other ships or move in close proximity to banks, any ship (regardless of size) may be heavily influenced by the induced hydrodynamic effects. So much so that in some cases collisions and groundings can result.

This video first examines bank effect, such as may be experienced by a ship navigating in a channel or anywhere that brings the ship close to the sea bottom.

By looking in detail at how ships behave in close proximity to a bank, the video builds up a picture of exactly what happens in these circumstances. It explains the influences of factors such as the distance off the bank and the depth of water. It supports the training requirements of STCW Table A-II/2.