Abstract
The existing ports are expected to handle ships larger than those for which they were designed. The main restriction in serving these ships is the depth of the port waters which directly affect the safety of a maneuvering ship. The under-keel clearance of a maneuvering ship in the port water area should be such that the ship moves safely. An undesired impact against the ground can damage the ship hull and block the port. Therefore, there is a need to develop a scientific method of specifying the safe under-keel clearance such that the safety of a ship will be maintained for different conditions. This article presents an assessment of navigational risk as a combination of the probability of ship impact against the ground and the resultant hull damage.
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