It does work really well in other areas, and finds all the small holes you might not.
However, if the boat is deflated and rolled up afterwards it can stick to itself inside the tube.
Some brands are supposedly made not to do this, but when I asked one manufacturer to give me some confidence the main tubes on the younger Nashers 380 would be OK Rolled up between being used they recommended keeping it inflated.
Everyone I spoke to said their product would not work in an airdeck, partly because of the internal fibre structure and partly because of the pressures involved.
To give you some confidence it can be done, I did some extensive repairs on the smaller Nashers airdeck several years ago and it's still fine.
The thread is a bit long, but the work I did to the airdeck is spread out through it amongst the work on the engine etc.
Introducing The Smaller Nashers 380 Aerotec