Immigrants evacuate and clear the deck.

The answer on the first floor is nonsense, and the answer on the second floor is basically correct, but let me answer the immigration question for the landlord. Seafarers' migration has a very long history. At present, many countries also need skilled seafarers to supplement the scarcity of this position, such as Canada and Australia, but there are also many preconditions. At present, Filipino seafarers tend to immigrate to Canada on a large scale. As long as you can get a green card in Canada and Australia, it's not a big problem. It's almost impossible for you to get a military officer's license within three years after you first boarded the ship. Moreover, the immigration requirements of Canada and Australia for seafarers are: those who have the qualification of first mate or above need to be introduced by shipowners, especially Canadian shipowners. It is not a matter of time before a sailor with no sailing background becomes a captain, but his education is limited. After 2008, if you don't have a college degree or above, you can't take the first mate exam, so judging from the current situation of the landlord, it will take at least 20 years to become a captain.