Hei Quaqmire. yes I looked at that cfg file before but there is nothing there to deal with rig for silent running speed. I even downloaded a mod which replace the back full order to silent speed but it was incompatible with OLC GUI mod so I came up with this simple idea of mine.
But of course we can always set the boat speed to 1 or 2 knots manually through the speed dial...if this idea can't be done