The MH370 story took another ugly turn after the search ship Seabed Constructor abruptly turned off its Automatic Identification System (AIS), sparking a riot on social media said WFTV.

At some point in time, before it disappeared, airport controllers were said to have lost MH370 as its identification system were either turned off deliberately or accidentally.

The same thing happened to the search ship the Seabed Constructor, the Norwaygian ship commissioned by the US-based Ocean Infinity when those tracking it suddenly lost touch with it.

It went “dark” on tracking websites not long after it had completed a curious circle, several kilometres wide, prompting many on Twitter to question what was inside the circle on the sea floor.

For nearly a week some aviation buffs and MH370 followers have been debating online whether the missing plane has in fact been secretly found, said RNZ.

If there’s no secret they said, then why did the ship AIS went abruptly off for several days, preventing online observers from tracking its movements.

Twitter hot on heals

The ship then headed south-west in a straight line, and a few kilometres later turned its AIS off.

“I’m sticking with my theory that the big circle is a piece of debris, and the line south was to locate the plane. When they think they found it they turned off AIS as protocol,” one tweet said.

“This. Is. Strange. I have never seen a ship do this. Maybe there’s an AUV lost down there?!?” said another.

Secret detour to shipwreck for treasure?

Some speculated that the ship had made a secret detour to a nearby shipwreck to retrieve a chest known to be on the sea floor. They believe the search turned into a treasure hunt!