Yes, get a helicopter up to have a look but mobilise ground/water units to assist in case quick action is needed to preserve life - the helicopter itself is just a location tool if they can't carry out a rescue.
I believe this was the case. I do not know of any unit that would do a short haul at night with the exception of one that I know of who have NVGs.
Incidentally, there was a water rescue in the town where I am based yesterday---with winch, in daylight.
