To guarantee the safety of ship navigation and port facilities, maintain navigation order, avoid the occurrence of water pollution accidents and improve the efficiency of ship navigation, most port authorities in the world have established the corresponding pilotage systems, including good cooperation and communication between captain and pilot. Pilot usually embark and disembark ship by pilot transfer arrangements. It can be guaranteed that pilots embark and disembark the ship safely, if the pilot transfer arrangements are installed correctly and well-maintained. Only when pilots board and disembark the ship safely, can the captain and pilot cooperate and information exchange well.