In most North American ports the bunkering of ships is often done with tank barges. In at least one port lube oils are delivered to deep sea ships at anchor by a tank truck that drives right onto a flat bed truck. But Norfolk, Va.-based Marine Oil Services has taken the lead with the construction of environmentally friendly double-hulled tankers. The company took delivery of its first vessel in November 2005. The 88 x 27-ft. boat has proven itself at work in New York. The owners have now gone back to the builder, C&G Boat Works in Mobile, Alabama, with an order for two more boats to the same design. Each of these small ships has tankage for up to 52,626 gallons of oil. The vessel that was delivered in 2005 is named Rolf Williams in recognition of the man who founded the company in 1958.