N.L.& G. GRISWOLD.

The flag is a blue-and-white chequerboard, described as resembling the modern N signal flag but with five blocks per horizontal row rather than four.

The number of checks is disputed. Rosanoski prefers the chart-supported G167. A painting of Challenge’s maiden voyage shows G245 at the foremast and a long white swallowtailed name pennant with red CHALLENGE at the main. One lithograph of the 24 May 1851 launch shows G246 and a rectangular name pennant; another in South Street instead shows G167. The accompanying South Street description counts thirteen blue and twelve white squares, called the name pennant in Rosanoski’s wording, leaving the descriptions inconsistent.