When ships get close to a port, they need to pick up a harbour pilot to
guide them in unless the captain on board has been to the port many
times before. A pilot provides local navigation advice to the ship’s
captain. The ship must book the pilot 24 hours before it either arrives at a
port or is due to sail from a port. Before the ship gets to the port, the pilots board ships where the crew needs assistance. When the ship is at sea, pilots use a boat or
helicopter to get on board.