1.   Films taken by a submersible robot established that the ship had sunk as a result of a large explosion.

2.   A second submersible robot was loaded on a Navy ship Monday and was expected to arrive at the search site early Tuesday morning, Ms. Brown said.

3.   In the control room, the submersible robot is operated by four research staff members, sitting at workstations with television screens.

4.   On Monday, ships returned with two high-tech submersible robots to hunt for them.

5.   The densest patches of wreckage there are being salvaged by Navy divers, accompanied by a submersible robot.

6.   After an inspection of the saw by divers and submersible robots, the Dutch companies Mammoet and Smit International said they had to add additional protection against rocks.