The Sunda Strait (Indonesian: Selat Sunda) is the strait between the Indonesian islands of Java and Sumatra. It connects the Java Sea to the Indian Ocean.
The strait stretches in a roughly north-east/south-west orientation, with a minimum width of 24 km (15 miles) at its north-eastern end between Cape Tua on Sumatra and Cape Pujat on Java. It is very deep at its western end but as it narrows it becomes much shallower, with a depth of only 20 m (65 feet) in parts of its eastern end. This makes it notoriously difficult to navigate, with sandbanks, very strong tidal flows and man-made obstructions such as oil rigs off the Java coast.
photo by MZ Gani