Instruction:
What does the company Navibulgar do

Response:
Navibulgar is a Bulgarian shipping company, the largest in the country, with a fleet of 70 vessels: 46 bulk carriers, 9 container vessels, 5 tanker and chemical vessels, and 10 combined tonnage vessels, including their new 30,700-tonne ship, which became a part of their fleet in June 2012.