The seal on the ship is divided into "round seal" and "square seal" used in the crew service book, which has legal effect. Not everyone can carve it. If it is illegal, the shipowner applies to the maritime department, and they engrave the seal and issue it. After April 1 this year, the seaman's service qualification certificate needs to show that you are performing duties on board the ship before you can get on or off the ship, and the captain's seal belongs to the captain, but it is not in the service book. Make sure your performance during your stay on the ship. Our company does not have a human education department to manage the human resources department (managing the deployment of crew). The ship seal is not in the company and is kept by the captain with the ship.