How to reset UV map?

Question

3D

I'm a newbie, I hope I can explain more or less correctly.
Made a mirror boat. He also had a scan (attached) corresponding. I did different things, but I can’t roll back anymore ... how to make the original location?
Copying the object didn't help... Why not draw the ship in a new way?
I am attaching how it became after I unwrapped it (unwrap) and how it was originally .. I asked for help in public. They said that if you didn’t keep the original one, then sculpt the ship again ...