Brahmos is a stealth supersonic cruise missile that can be launched from submarines, ships, aircraft or land. It is a joint venture between Republic of India’s Defence Research and Development Organisation (DRDO) and Russian Federation’s NPO Mashinostroeyenia. The name Brahmos is a portmanteau formed from the names of two rivers, The Brahmaputra of India and the Moskva of Russia.

Actually, the locomotor part of a hydra is not its tentacles. Hydras move by a remarkable way called "looping." They attach one end of their body to a surface and then release the other end, allowing it to move and attach again. This looping movement is facilitated by the contraction and expansion of the body, rather than the use of tentacles. Tentacles are specialized structures primarily used for feeding and defense in hydras.

The Prithvi missile is a family of tactical surface to surface Short-Range Ballistic Missiles (SRBM) and is India’s first indigenously developed ballistic missile. Development of the Prithvi began in 1983 and it was first test-fired on 25th February, 1988 from Sriharikota, SHAR Centre, Potti Sreeramulu Nellore district, Andhra Pradesh.

It has a range of upto 150 to 300 km. The land variant is called Prithvi while the naval operational variant of Prithvi I and Prithvi II class missiles are code-named Dhanush (meaning Bow). All missiles programme under DRDO.