1.   The navy says that burial at sea is less expensive, demands less shipyard work, and is isolated from human activity.

2.   Even if that failed, said the navy, it could still use inflatable pontoons to raise the vessel.

3.   Late Monday the Russian navy said it had two submarines investigating the hull of the stricken vessel for possible signs of damage.

4.   Since then, piracy in the strait has been all but eliminated, the navy says.

5.   The navy said it had begun a rescue effort in the Barents Sea on Monday.

6.   The navy said it had begun an effort to rescue the crew using a compression chamber dropped from a ship above.

7.   The navy said the spill posed no risks to Caribbean coral reefs.

8.   The Russian navy said it was eager to receive the assistance.

9.   The sub was not carrying any nuclear weapons, the Russian navy said.

10.   The submarine was not carrying nuclear weapons, the navy said, but was powered by two nuclear reactors, raising concerns about possible radioactive contamination.