Deviation is an intentional departure from the set or agreed course of the voyage. The ship is not permitted to leave this route for any purpose without justification. To protect themselves the ship-owners enter a clause in the charter party called the ?deviation clause? which allows them to deviate to save or attempt to save life and/or property at sea and to give the owners the right to deviate for bunkering purpose (by inserting another clause called the ?P & I Bunkering Clause?).