Indian and US naval forces have come together to carry out a joint drill off the coast of Mumbai.

The three-week-long exercise between the two countries codenamed INDIAEX 2012 started on October 19 and is scheduled to get over by November 13.

Cooperation between the US submarine rescue system and Indian submarines is being demonstrated in the excercise.

Four Indian submarines are taking part in the exercise .

This is the first exercise of its kind between the two sides which have so far been practising joint operations under the UN mandate in the Malabar series of joint drills.