A more thorough explanation:

PRATIQUE

Pratique is a license that allows a ship to trade in a specific port or country after meeting the quarantine requirements or presenting a clean bill of health.

For example, if a ship arrives at a port and the authorities suspect that there may be a contagious disease on board, they may require the ship to undergo quarantine procedures. Once the ship has been cleared of any health risks, it can be granted a pratique license, which allows it to enter the port and conduct trade.

Another example is when a ship has been at sea for a long time and has not made any stops at other ports. In this case, the ship may be required to present a clean bill of health before being granted a pratique license to enter a new port.

The examples illustrate how pratique is a license that allows a ship to enter a port or country after meeting certain health requirements. In the first example, the ship had to undergo quarantine procedures to ensure that it was not carrying any contagious diseases. Once it was cleared, it was granted a pratique license to enter the port and conduct trade. In the second example, the ship had to present a clean bill of health to show that it was not carrying any diseases before being granted a pratique license to enter a new port.