Though I'm no expert familiar with what military types use for their work or transportation, proof of the presence of intelligent life has clearly been proven here as well. Along with the red-and-black arrowed, side-by-side plane shots from the plane's starboard-rear in post #240 that rise ever increasingly out of the water, we have clear evidence of other, unannounced and later unreported people, other than plane occupants, at the scene--doing something that was pre-planned and prepared for (in that they've "set up shop" with their equipment).
1. That these people/divers show no regard for the seriously injured among the passengers in any effort to get them ashore before is hideous, showing ill preparation on the part of conspiracy the planned this hoax.
2. Given the other equipment we see at the engine and all the bubbling, we can only surmise they're creating human damage that would later be covered up under the guise of a winter storm.
3. Nobody appears "officially" on scene for another fifteen minutes and the helicopters that would lift them out of the water don't show up for another half hour. The pilot later said he knew rescuers would arrive a half hour after being notified. Could the fact that it took those rescuers over over an hour be due to the fact that they had to wait for the guys at the plane to finish up with their work?
4. With a team of divers lying in wait to swoop down onto the scene with the obvious plan to create damage at the plane means the plane was brought down at a known, pre-planned location. Would the plane's claimed engine failure therefore then have been mid-air sabotage or a hoax... that never really happened?
5. At 4:20pm (about fifteen minutes after the slip-n-slide picture was taken, the USCG command C-130 arrived on scene and radioed to controllers it “had both the aircraft and a rescue boat in sight.” No news report contains anything about a boat. Was that boat how these divers made their way to the scene? 
SDV's dont' "just happen" to be in a particular area. They travel around the globe, mostly underwater, attached to submarines. Such submarines have to be purposed and scheduled days if not weeks in advance. The Caravan going down in this area must also have been known days if not weeks in advance.