Question

why ship carry more load than an aero plane?..​

Answer 1

$\huge\underline\red{Answer:-}$

Because a ship only needs to bear the load, whereas an aircraft needs to lift the load. A ship can be made as large as practical as long as its buoyancy is greater than its load bearing capacity.

Answer 2

Answer:

the upthrust exerted by water on ship is more than the upthrust exerted by air on aeroplane so that ship carry more