Student or Learner
Is it right to write ' we are in the boat' and "the boat is on the water/sea/'?
I'm not a teacher.
In my opinion 'you are in the boat', especially, if it is a particular boat, and a small one.
Sometimes a large passenger ship is called a 'boat' then 'you are on the boat'.
'The boat is sailing on the sea' when you want to emphasize the fact of sailing, but if you mean a particular time of sailing you say 'the boat has been at sea for two weeks'.