A port that a ship is diverted to when the master considers it unsafe to continue the voyage due to a peril that threatens the common safety, e. g. when there is a dangerous ingress of water into the ship; there is a dangerous shift of cargo; 

A Type B ship in which the reduction in freeboard has been increased up to 60% of the total difference between the values for basic Type A and Type B freeboards. The ship must meet one compartment damage stability requirements. A large number of Panamax and Capesize bulk carriers are B-60.

The master of a UK ship must ensure that, when the ship enters a VTS area in the territorial waters of an EEA State (i. e. an EU Member State, Norway or Iceland), the ship must comply with the rules of the VTS if they are in accordance with IMO Guidelines. The master of a non-UK ship must ensure that, when the ship enters a VTS area in UK territorial waters, the ship must comply with the published or promulgated VTS rules.

 

Where a port State authority requires that specific ballast water procedures and/or treatment option(s) be undertaken, and due to weather, sea conditions or operational impracticability such action cannot be taken, the master should report this fact to the port State authority as soon as possible and, where appropriate, prior to entering seas under its jurisdiction. (BWM Guidelines, 8.1.1)