Inlet of the North Atlantic Ocean.
Extending northwest from the southeastern tip of Baffin Island , Can., it is about 150 mi (240 km) long and 2040 mi (3264 km) wide and has a maximum depth of 400 ft (120 m). It was discovered in 1576 by Martin Frobisher . The town of Iqaluit at the head of the bay is the capital of Nunavut .