In SOLAS regulation V/23.
On behalf of the owners of the ship and the owners of all "maritime property" on board including any cargo, cargo containers, bunkers, stores and other equipment, and the recipients of any freight at risk. On a ship with contractors' equipment on board, such as a diving support vessel, the owners of that equipment would also be included. All the owners of "maritime property" become liable for a contribution to the salvor's reward if he is successful.
“+”(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.