A port day on a cruise ship is just a day when the ship is tied up alongside hence she is in port.
Ulysses was tied to the mast of his ship by his men.
...Is "aport": On a ship, while facing forward, the left side of the ship is called "port" and the right side of the ship is called "starboard".
If you aboard the ship and you face toward the front of the ship, the port side is the left side of the ship. So, the port side of a ship would show the port light.
Port is the Word for the left side of the ship.
When facing towards the bow of a boat or ship, while standing in the middle (midships), the right side is starboard (green). While the left side is port (red). Larboard was the archaic term for port. To help remember: Port is red and there is little left in the bottle. (Obviously, using this, having established the port side, starboard is opposite!)
Call at a port.
He is tied to the mast of his ship by rope, while his fellow sailors (with wax in their ears) row quickly away.
A stop for a ship is called a port of call. A cruise ship might be said to make a stopover (or port call) at a port of call.
Port of Mandvi
What is the largest ship port in New Delhi?
A Port Day is an operating day when the ship is in an out-port (not at the home port).