A boy making an 'oh!' face in front of a bay.
A child is surprised by the ships.
Just because the boy is making an "oh!" face does not mean they are surprised.  There may not be ships in the bay.
A child making a surprised facial expression might not be surprised by ships.
A boy at a bay does not imply that ships are present. A boy making an 'oh!' face does not infer that he is surprised.