Delta is 6,000 km2 in area (2,300 sq mi

Soyuz 37 was a 1980 Soviet crewed space flight to the Salyut 6 space station. It was the 13th mission to and 11th successful docking at the orbiting facility. The Soyuz 37 crew were the third to visit the long-duration Soyuz 35 resident crew.

The Indus River Delta forms where the Indus River flows into the Arabian Sea, mostly in the southern Sindh province of Pakistan with a small portion in the Kutch Region of India. The delta covers an area of about 41,440 km² (16,000 sq mi), and is approximately 210 km (130 mi) across where it meets the sea. The active part of the delta is 6,000 km² in area (2,300 sq mi). The climate is arid, the region only receives between 25 and 50 centimetres of rainfall in a normal year. The delta is home to the largest arid mangrove forests in the world, as well as many birds, fish and the Indus dolphin. The fifth largest in the world, the Indus Delta is a designated wetland and Ramsar site, containing seventeen major creeks or estuaries and numerous minor creeks. Major estuaries of the Indus are home to the Indian Ocean humpback dolphin.