The act of navigating; the act of passing on water in ships or other vessels; the state of being navigable.
the science or art of conducting ships or vessels from one place to another, including, more especially, the method of determining a ship's position, course, distance passed over, etc., on the surface of the globe, by the principles of geometry and astronomy.
The management of sails, rudder, etc.; the mechanics of traveling by water; seamanship.
Ships are obliged to take on harbor or river pilots - who provide specialized local navigation - when they approach a port, but in the canal, a Suez crew is also obligatory. The crew members are there in case the ship needs to be moored during the canal transit, but this rarely happens. Rose George