It is made of two island groups - the Andaman Islands and the Nicobar Islands - separating the Andaman Sea to the east , from the Indian Ocean . These two groups are separated by the 10 Â N parallel , the Andamans lying to the north of this latitude , and the Nicobars to the south . It comprises two island groups , the Andaman Islands and the Nicobar Islands , separated by the 10 Â N parallel , with the Andamans to the north of this latitude , and the Nicobars to the south .