The Chinese had a policy of one child per family. This resulted in most Chinese families having one male child. Now, China has way more men than women.
This has caused a lot of Chinese men to never have, well, relations with a woman.
In short, there are a lot of horny Chinese men.
These Horny Chinese men have noticed that there are women on American warships.
So, these horny Chinese men built drones to follow our warships around in the hope that they’ll get to see naked female sailors.
It is known as The Sneaky Peekie Operation.