Port side refers to the left side of a ship or boat when facing the bow. There are many synonyms for this term, including larboard, which was used in the past but has largely been replaced by port side. Other options include port beam, port quarter and port bow. Some seafarers may also refer to the port side as the "red side" since navigation lights on this side appear red at night. Regardless of the specific term used, it's important for anyone working on a vessel to know and understand the layout and terminology to ensure safe and efficient operations.