Overseas Shipholding Group Inc - Class A specializes in operating a fleet of vessels that transport crude oil and petroleum products, primarily under the United States flag. With a history dating back to 1948 and based in Tampa, Florida, the company plays a crucial role in the maritime industry. It owns or operates 21 vessels, boasting a combined capacity of about 1.5 million deadweight tons. Its services cater to a diverse clientele, including independent oil traders, refinery operators, and various government entities, both in the U.S. and internationally.