He was inviting me on his yacht.

来邀请我乘游艇出海。

If you want to arrive secretly in a country, arriving in a populous harbor by yacht is not the way to do it.

如果你想到达个国家， 乘游艇到达人口稠密的海港并法。

He has the yacht, and the captains just sit there by the phone every day just in case he wants to go out on it.

有艘游艇，船长每天都坐在电话旁，以防想乘游艇出去。