In the 3 dot menus (top LHS of the screen) touch the quadcopter
symbol and then go to the advanced options and the response-option itself is in there, but bear in mind the VERY SHORT delay that it uses. I would not recommend flying with "always" as your normal option.
In your case I would switch to it as you approach the boat, then switch back to the default "breakdown" for the next flight.... until you come to land again etc.etc.
People may say that that is daft but I once caught my self messing with the P3 and realised I had had the sticks in the CSC postion for a couple of seconds, fortunately the delay for the P3 is around 5 seconds but it shook me.
With the MM in "emergency only" mode (which equals the
M2P/Z's breakdown) the CSC results in quite a nice helix especially in its slower flight modes. I am not going to try it with the
M2P