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.

Why Do Ships Use Port & Starboard? - Martide

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Port and starboard - Wikipedia

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

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Why do ships use 'port' and 'starboard' and not 'left' or 'right

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

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Why do ships use 'port' and 'starboard' and not 'left' or 'right

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