Explain please.
The word stealth has lost its true meaning nowadays. Every country is claiming stealth ships,
steatlh submarines and soon India will introduce the term stealth aircraft carrier.
There has been a significant shift in warship design in the past two decades to incorporate stealth. For example, the Shivalik Class frigates in India, Type 45 destroyers in United Kingdom, La-Fayette Class frigates in France, Visby Class corvettes in Sweden and many more.
The primary aim of the stealth technology is to render the warship invisible to enemy detection systems such as radar and magnetic sensors
by reducing levels of reflected radiation and at the same time, lowering the warship’s own emissions. The various signatures and cross-sections include radar, thermal, acoustic, magnetic, communications, optical & bio-luminescence and research is discovering more. Radar cross-section can be reduced by use of radar absorbent materials, use of low probability of intercept transmission, remove corner reflectors, break-up of superstructure and meta-materials.
Though no stealth platform can hide a a ship or aircraft 100%, it's design and use of meta-materials reduces the RCS, and thermal, acoustic, and magnetic signatures to a large extent.