Water movement is detected by all AF points and this greatly increase AF latency. Set function no. 8 on 2 to prevent the camera to use any adjacent focus sensor, then select the sensor that best suits your framing. The two center sensors are the most sensitive.
Servus, Alin P.S. BTW, I believe you mixed up AF-C and AF-S. The AF-C is the one that allows shutter taking precedence to focus. Steve wrote: SD> Let me mention a situation where I did have AF problems with the MZ-S. SD> Last night I was taking pictures of a swim meet. The pool area was dim SD> enough that I had to use my 50 at f1.4 to get 1/60 exposure time. (No SD> flashes allowed) There were a few shots when the camera would not fire SD> the shutter, since I had it on the AF-C setting. I figured that there SD> was no point in switching to AF-S since the shutter would fire but the SD> shot would be out of focus. I tried MF but I suspect that I'm going to SD> get out-of-focus shots. I realize that this is a terrible condition for SD> AF. Any suggestions for the future?

