As above + we also had an whole host of flights today in this country without incident, same yesterday in fact, and the day before and many many before..... you get my drift.
At least we know the floats work. Better an unintentional deployment in the air, than landing in the water and nothing going off. I recall at least two Lynx during my time, where that was the case, and they sank very quickly. The Puma has a pretty good reliability with floats.