Yes I set the outlet boundary also, there they just again wanted to put two parameters namely:
freesurface level and bottom level.
These two parameters I also put for inlet(whose value are same for both cases) ,except, in inlet I also added velocity value.

Well free surface should come above some finite value (say 3,6 meter above baseline) .
My baseline is passing through bottom of ship.

What can be the reason than, that my free surface go down of ship hull instead of up of baseline (or bottom of hull, 3.6 meter. )