The Indian Ocean is the third-largest body of water in the world, covering about 20% of the Earth's water surface. Sea-level can change in one second up to over 10 metres. That is the scientific part of the Indian Ocean.
Its surface is dominated by counterclockwise gyre (broad, circular system of currents) in the Southern Indian Ocean, an experience a lot of humans cannot retell anymore,... some can! The horror of the Indian Ocean.
The JAVA TRENCH (7,725 km deep!), also called Sunda Double Trench, is located generally 190 miles (305 km) off the South-Western coasts of the islands of Sumatra and Java, Indonesia. The South-Sea Spirit-queen, Ratu Kidul, has been crowned to the absolute Ruler of the Indian Ocean,... the spiritual heart of the Indian Ocean ...
(link is in Dutch!)