What does ‘Vessel on Master’s orders and Pilot’s advice’ mean

As the North P&I Club informs, it is well known that in most places around the world the presence of pilot on the bridge does not relieve the Master or officer in charge of the watch from their duties or obligations for the safety of the ship. However, there are many cases where the Master appears to relinquish control to the pilot or fails to challenge a possible unsafe instruction, sometimes leading to an incident.