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; 

“+”(properly called a Pattee cross but often called a Maltese cross) means the ship was constructed under survey by Lloyd's Register surveyors; "100" means the ship is suitable for seagoing service. "A" means the ship was constructed or accepted into LR class and is maintained in good and efficient condition. "1"means she has good and efficient anchoring and mooring equipment.

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)