The 24 hour quarantine service shall be applied to any port with conditions for a ship to navigate and call at or leave at night as well as for night-time loading and unloading.
凡具备船舶夜航条件，夜间可靠离码头和装卸作业的港口口岸，应实行24小时检疫。
2
Provided is a mobile harbor capable of loadingandunloading cargo with a ship being at anchor in the sea far from the shore, not coming alongside the pier of a stationary harbor.
Thirdly, we study the problem that quay cranes perform loadingandunloading operations simultaneously in the same ship-bay, namely quay crane dual cycling scheduling problem.