UNION OIL CO. OF CALIFORNIA.

A black-and-white photograph of Warwick confirms U30’s funnel. Stewart’s 1953 and 1957 flags enlarge the “o” and omit its dot. Loughran’s 1971 article extends the diamond throughout, but his 1979 book does not repeat this, so Rosanoski treats it as an error. Merchant Ships 1949 records the flag as unknown. Joe McMillan’s FOTW illustration of 29 November 2001 cites Wedge, Stewart and the US Navy hydrographic reference.

The livery changed in 1966, the company’s 76th anniversary, to the U29 funnel and blue-and-white diagonally striped flag. The U28 funnel followed from 1970, possibly in response to adverse publicity after the Torrey Canyon disaster. Loughran’s 1979 illustration omits white edging around the U29 circle; his 1971 article specifies it without showing it. Mitchell likewise omits the funnel edging. McMillan’s U29 flag is based on Styring 1971.

McMillan’s U127 flag is based on a photograph of house flags in the dining hall of the US Merchant Marine Academy at Kings Point, apparently taken in the late 1970s.