The ceremony of Crossing the Line is an initiation rite in the British Merchant Navy, Dutch merchant navy, Royal Navy, United States Navy, U.S. Coast Guard, United States Marine Corps, Royal Australian Navy, Russian Navy, and other navies that commemorate a sailor's first crossing of the Equator. The tradition may have originated with ceremonies when passing headlands, and become a "folly" sanctioned as a boost to morale, or have been created as a test for seasoned sailors to ensure their new shipmates were capable of handling long rough times at sea. Sailors who have already crossed the Equator are nicknamed (Trusty/Honorable) Shellbacks, often referred to as Sons of Neptune; those who have not are nicknamed (Slimy) Pollywogs (in 1832 the nickname griffins was noted).