V in the context of berth refers to the specific slot, area, or space, typically in a harbor, marina, or on a ship, train, or other vehicle, reserved for the mooring or parking of a vessel, vehicle, or for accommodating passengers. It is a predefined allocation which is labelled as 'V' in a systematic approach to help in identification, organization, and management of spaces. It often includes facilities for securing or anchoring the vessel or vehicle and can also provide users with various amenities and services. It is crucial for ensuring orderliness, safety, and efficient utilization of available spaces.

1. The cruise ship had a luxury berth designed for comfort and relaxation during the journey. 2. The fisherman carefully guided his boat into the berth at the crowded marina. 3. The train's sleeping car has several berths for passengers to sleep during long overnight journeys. 4. Due to the stormy weather, the captain decided to pause and find a safe berth for the night. 5. The huge yacht requires a wide berth due to its size and complexity.

The berths on the V & O-class submarines, primarily used by the British Royal Navy during World War II, were so compact and efficiently designed that they could accommodate up to 85 crew members. Despite the vessel's overall length of just 275 feet (about 84 meters), a striking design achievement of the 'V' class was the ability to house such a large crew without compromising on operational efficiency or comfort. They even included amenities like a small but functional galley and common area, marking the V-class submarines as marvels of naval design engineering.