Sailors are a superstitious lot. No rabbits aboard, never name your destination, don’t rename your ship, don’t leave on Friday, no whistling, no banana’s , ect ect.
Sacrificing to Neptune covers a multitude of traditions. And rites of passage include becoming a Shellback by crossing the equator . We turned west once reaching the magic line and followed it for awhile in order to properly appease and hopefully please King Neptune for future good luck . Ceremony and rum gifted over the side.