(1) Where a shipbroker, acting for a shipowner, fixes a ship on charter and thus brings the shipowner into a contractual relationship with the charterer;
(2) where a port agent, acting for a shipowner whose ship is to visit the port, arranges stevedores and port services for the ship’s visit; (3) where a shipmaster, acting for the employer, engages a crew member on a crew agreement; (4) where a shipmaster, acting for the shipowner, each cargo owner and any time charterer, agrees to an offer of salvage assistance when the ship and cargo are in peril.
