(NYGM) IXD2 keeps slowly sinking.

Hello all.

I'm use to playing GWX, but I read so many great things about NYGM that I had to give it a try!

However, in NYGM my IDX2 boat, at slower speeds, slowly sinks. When I increase speed to full or flank speed, then the boat will rise to whatever meter I designate. I'm just curious if this behavior is normal is all. I can adapt to it no problem.