Super-Subs

If you're the commander in chief of a modern naval force, you'd have very little to fear in terms of an attack on your ships. You'd have defense nets set up around your bigger cruisers and submarines to enforce the grid. But, your comfort will probably be short lived as soon as sonar reports multiple torpedoes in the water, heading your way, right out of the blue.

The nuclear-powered grim reaper: America's newest generation of "super-subs", the Virginia class attack submarines. Quieter than their predecessors, the Los Angeles and Seawolf clas boats, Virginia subs are undoubtedly the most dangerous fish swimming in the ocean. They are faster, armed to the teeth, able to deploy US Navy SEALs, fire Tomahawk and Harpoon missiles against land-based and sea-going targets, and are able to carry out their orders, then slip away leaving the enemy in a confused and vulnerable state.

A lot of details about these super-subs are kept under wraps, for good measure, so we don't know the extent of their abilities, but from what information has been released to the public we can gather that a deadlier vessel hasn't yet been built.