When commissioned, 'Astute' will be one of the most advanced submarines in the world.

At the time of launch, it was the most advanced personal submarine in the world.

And without these men, we would not have the technically advanced submarines we have today.

Also in 2004, the ship was the first to be fitted with the new low-frequency Sonar 2087 designed to detect the most advanced submarines.

Let us see how well he deals with the most advanced nuclear submarine in the Russian Navy.

Ella drops everything to join a team of researchers heading over there in the most advanced submarine in the world.

They were among the largest submarines ever built to date, and were known as the most advanced submarines of the period.

Now we'll lose the Seawolf, the most advanced submarine in the world.

The story inspired inventors to build more advanced submarines.

The Navy is spending $80 billion for advanced submarines and $70 billion for destroyers.