I had mentally timetabled this for Sunday night viewing, but in the end I couldn't be bothered.
I watched the first series and it tried my patience a little. The basic premise was actually quite intriguing - a police officer carrying out a murder investigation on a nuclear submarine in which she had questionable jurisdiction and limited communication with the outside world. But the way in which she was able to move around the submarine as if she owned it and in which the crew were increasingly willing to submit to her authority just stretched credibility to breaking point. And as
beamer noted the box ticking was just tiresome.
Nothing I've heard about Series 2 suggests to me that it will be any improvement.