It's a 40-minute run to the boatyard for a bottom cleaning session; time for more experimenting with the Singh-Ray 8-stop Variable ND filter.

The variable ND was dialed in to produce a 1-second shutter speed to capture the motion, but I had to hand-hold the camera and that introduced the shake on top of the motion blur. I'm part-way to the effect I want. Next session, the camera gets mounted on the FilmTools suction mount to reduce/eliminate the shake. Will also get the scene on video in both horizontal and vertical formats.