Harbor Barge or Mooring Barge is a type of vessel specifically designed for port operations, which typically does not have self-propelled capabilities but is moved to a designated location with the assistance of tugboats or other vessels. The working scenarios of port storage ships mainly include the following aspects:

1. Mooring and Anchoring: Port storage ships can serve as temporary or permanent mooring facilities for docking and mooring other vessels, such as cargo ships, oil tankers, fishing boats, etc. They are usually equipped with mooring devices such as mooring stakes, mooring rings, and anchor chains to safely anchor other vessels.

2. Cargo loading and unloading: In some ports, port storage ships can be used as temporary cargo loading and unloading platforms, especially in situations where dock space is limited or additional loading and unloading facilities are required. They can be equipped with cranes, conveyor belts, or other loading and unloading equipment for the loading and unloading of goods.

3. Repair and maintenance: Port storage ships can serve as temporary work platforms for ship repair and maintenance. The shipyard or maintenance team can carry out ship inspection, repair, and maintenance work on the reserved vessel.

4. Offshore operation support: In offshore operations such as oil drilling, marine engineering, etc., port storage ships can serve as support platforms, providing services such as material supply, personnel transportation, and equipment storage.

5. Emergency response: In emergency situations such as ship accidents, maritime rescue, etc., port storage ships can serve as temporary rescue platforms or shelters to provide safety protection for stranded personnel.

6. Leisure and entertainment: In some tourist ports, harbor storage ships can also be used as temporary leisure and entertainment facilities, such as water restaurants, bars, or entertainment boats.

The working scenario of port storage ships depends on their design and equipment, as well as the specific needs of the port. They play an important role in improving port operation efficiency, supporting offshore operations, and providing emergency services.