Buoyancy - How to stabilize ship floating

I still don’t understand how Buoyancy works, yet I managed to make a ship float(something other than small boat), but I met another nuisance, I can’t find a right setting to stabilize ship floating on water

when I spawn a ship, the whole ship sink deep in water then it float!(Unrealistic)

if I increase the max Buoyant force or the coefficient, the ship no longer sink but the ship bounces on the surface of the water before it settle(also unrealistic)

I tried to mess up with the other numbers even though I have no idea what effect they have, but I can’t notice any difference
1- All I want is the the ship to float steadily(swing/shake less from the waves)
2-I want is realistic floating, I want the pontoon to always float above water and never submerge under water(in another word, I want the ship to float above certain level)
3- I want the ship to have some mass (atleast 4k) because I don’t want it to be pushed by actors or small objects, so 100 won’t do