Topside (noun)

The upper surface of something, especially the upper surface of a ship or boat.

Origin:

Derived from the word "top" which means the highest or uppermost part, and "side" which means a surface of an object.

Examples:

1. He went topside to check on the weather conditions.
2. The crew was working topside to repair the ship's hull.
3. The topside of the boat was covered in salt and spray from the sea.
4. He climbed the ladder to the topside of the ship.
5. The topside of the submarine was equipped with sensors and communication equipment.