You can always fly drones around.
Edit: Non-Lethal, Non-Army drones. Just flying cameras to see what's happening there, or how they're living. Even better, really small cameras that look a bit like slow-moving birds.
A couple of years ago I was driving on the I-95 from Las Vegas to Tonopah. Out of nowhere, a predator drone came up and flew next to our car for a good couple of hundred yards. A strange and somewhat frightening experience, even for someone who knows what drones are.
Besides, the thick jungle canopy wouldn't allow drones to get a good look anyway. We could launch crawling cameras, disguised as forest creatures, but the risk of getting exposed isn't worth the potential damage to the tribe, IMHO. I think the best thing to do is to just leave them alone.
They look pretty freaked out to me. Their gazes are out of this world, very intense.
Because a huge tanker stuck in the water would not freak them out, maybe? It's way more impressive than a small drone flying around, for people who don't even have boats.
No way are there going to be drones around Andamans anytime soon.
[1] http://en.wikipedia.org/wiki/Andaman_and_Nicobar_Command