Fitted with an array of weapons to enhance her capability, the frigate is capable of near silent running and has a stealth design which significantly reduces its radar signature.

BBC: British frigate runs aground

The drone is a wing-shaped aircraft, like the stealth bomber, a design that is supposed to make it less visible to radar.

WSJ: Iran Says It Shot Down Unmanned U.S. Plane

Some of China's supercomputers have been used to design wings for China's stealth fighter, now in test phase, and to design parts for China's first commercial jet.

WSJ: China's Not-So-Super Computer Program

The Type 056 stealth frigate has a sleek design that helps it evade radar detection, and needs just one-third of the crew used by its predecessor.

BBC: China navy launches new stealth frigate

The B-1B has some stealth features: A smooth design and the use of radar-absorbing materials gave it an appearance on radar that is said to be only 1% of that of the older B-52 bomber, even though it is only a little shorter - at 146 feet (44.5 metres) - and weighs almost the same.

BBC: Profile: B-1 bomber