SS Aberdeen was a British cargo liner launched in 1882. She was designed for service from London to Australia. She was the first ship to be successfully powered by a triple expansion steam engine. The triple expansion engine then became the standard type of steam engine to be installed in seagoing vessels. The fuel economy achieved meant that steam could now outcompete sail on all major commercial routes. Aberdeen was sold in 1906 to the Ottoman government. She served as a Turkish troopship in World War I until a British submarine sank her in 1915.