A gangway is a temporary or movable platform or walkway that provides a safe and accessible passage between a structure (such as a ship, aircraft, or building) and another structure or the ground. Gangways are typically used in various contexts to facilitate the boarding and disembarking of passengers or the movement of cargo. They are designed to bridge gaps, such as the space between a vessel and a dock or an aircraft and a terminal, to ensure a safe and efficient passage.

Here are some common uses of gangways:

1. Maritime: Gangways are often used in the maritime industry to allow passengers and crew to board and disembark from ships, ferries, and boats. They are also used for loading and unloading cargo onto vessels.

2. Aircraft: At airports, gangways, often referred to as jet bridges or passenger boarding bridges, are used to connect the terminal building to the aircraft. They provide a covered and climate-controlled passage for passengers to board and disembark.

3. Construction: In construction and building maintenance, gangways can be used to create safe walkways for workers at elevated or otherwise hazardous construction sites. They help prevent falls and accidents.

4. Events and Entertainment: Temporary gangways may be used at events, concerts, or venues to provide access to stages or raised platforms for performers, crew, or equipment.

5. Loading Docks: In industrial settings, gangways are employed at loading docks to facilitate the movement of goods between trucks or trailers and a warehouse or facility.

6. Festivals and Fairs: Temporary gangways can be used at outdoor events, such as festivals and fairs, to create accessible walkways over uneven terrain.

7. Boat Ramps: Gangways are used at boat ramps to provide a smooth transition from the shore to boats, making it easier to board and disembark.

Gangways come in various designs and sizes, and they can be made of different materials, including aluminum, steel, or other durable materials. The choice of gangway depends on the specific application and the requirements for safety, mobility, and load capacity. In all cases, gangways are essential for ensuring the safe and efficient movement of people and goods between different points, particularly when there is a difference in height or an obstacle that needs to be bridged.