Look for THOMSEN PARAMETERS APP by Stiebler, it fixes the "rubber duck" like actions of the ships.
From the readme...
"THOMSEN PARAMETERS APP searches through your SH3 'Sea' folder looking for ship.sim files (eg 'NKC3.sim'). It then replaces optionally any or all of eng_power, rudder-drag, surfaced left-right drag coefficient ('LR') and gc_height (= centre of gravity) with values specified by the user. Every .sim file in your sea folder will be examined and altered!"
