I think there's a lot of scare-mongering about Navis and their inability to survive a little moisture. Roff is absolutely correct about not submerging it, but a bit of wettness is not going to harm it provided the bezel is reaonably tight. It's not going to instantly mist up if you sneeze on it.

I've regularly cleaned my Navitimers under a very slowly running tap (i.e. more than a drip so that it's constant, but nothing with any great force behind it) for years now with no ill effects at all. Obviously I try not to concentrate the flow on the crown or pushpieces, but that aside they've been absolutely fine.

As I said above, if your Navi has quite a loose bezel that will compromise the water resistance somewhat, so just be even more careful in those circumstances.

Is the navi really that sensitive to water?

I clean my navi world by submerging it in a bowl of hot water mixed with soap. I have it submerged 5-10 minuets just so the dirt can easily be brushed away with a soft brush. I do this maybe 2-3 times a month.

According to Breitling this watch should be able to withstand -+ 3 bars of pressure. In theory that equals a depth of 20 meters. I don't think that there is more pressure in that bowl of water than there is when I wear it. It sounds scary that ppl are afraid to wear their watches due to sweat that could potentially find it's way in to the watch. I haven't had any problems with moisture or humid on the inside of the crystal so far.

As long as you service the watch regularly it shouldn't be a problem right?

Actually 3 atmospheres is 30 metres, but the key is that it is static water pressure.

That means the pressure exerted at a depth of 30 metres by non moving water. When you add movement of the watch relative to water (or water relative to watch if you prefer) you can very easily exceed a pressure of 3 atmospheres under a running tap or shower.