Why do ships use port and starboard instead of left and right?

Unlike left and right, port and starboard refer to fixed locations on a vessel.

Stock du Jour -- BXRX - by C. Maoxian - The Stock du Jour

Conditions Nav, PDF, Mississippi River

Why Do Ships Use 'Port' and 'Starboard' Instead of 'Left' and

Why do boats/ships use starboard and port instead of just right

Why do boats/ships use starboard and port instead of just right

Port and starboard - Wikipedia

Why do ships use port and starboard instead of left and right?

Hindustan Institute of Maritime Training

Why do ships use port and starboard instead of left and right?