What is the main purpose of Zhuhai Customs to recruit crew members here? I heard it was to Kameyama. Okay？ Am I the person who does this job?

Not necessarily a civil servant. It should be working in the customs (now belonging to the marine police) anti-smuggling boat. Judging from your description, it should belong to the recruitment of sailors, not civil servants, because civil servants in the customs system are admitted by the national unified examination. You should be talking about the staff recruited outside the ship because of the lack of relevant crew.

If this is the case, you usually go to sea for two or three days and rest for a few days. The distance to the sea is not far, but the wind and waves in the sea area of Kameyama are sometimes relatively large. If it's related to sailing, you can try it if you can adapt.

It's best to attach relevant information about the recruitment, which should help you determine more specific situations and then give suggestions for reference.