Gregory
When they get the kit down to the reef there will be ample opportunity to sort out Norwich City wreckage from 'other'.
Sea going vessels are constructed with a totally different set of needs taken into consideration compared to aircraft.
A ship needs to be strong enough to defeat the worst that oceans and sea's can throw at it, weight isn't an issue as can be seen with some of the super tankers and cruise ships around these days.
A plane also needs to be strong but, weight is an issue, lightweight materials and construction methods are paramount.
To summarise. If you made a plane using ship construction materials and methods it would remain on the ground. If you made a super tanker using aircraft construction materials and methods, it wouldn't make it out of the shipyard.
It will be easy to sort aircraft from ship debris. Hopefully that is exactly what they end up doing.