Now Brazil is moving forward with plans to develop its first nuclear attack submarine.

And last week it won a $2 billion contract to build a new attack submarine.

Despite these limitations, she remained an effective attack submarine through to the end of her career.

You are also wrong that there is no need to build a new class of attack submarines.

Both were attack submarines and did not carry nuclear missiles.

A few years back we had almost a hundred attack submarines.

They are the most compact nuclear attack submarines to date.

In response to this the attack submarine became important.

Now there's something else they have to contend with: nuclear attack submarines.

His principal concern was American attack submarines in the area.