Can you see ships from 35000 ft up?

Yes, it is possible to see large ships from 35,000 feet, particularly if visibility conditions are good and the ships are relatively close to the coastline or in busy shipping lanes. However, due to the altitude, the ships would appear quite small and may be difficult to distinguish without binoculars or powerful cameras. Generally, commercial aircraft fly above the clouds, which can also obscure visibility of objects on the water.