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[[circled]] 110 [[/circled]]

To gain the information I'll bet) knows about the "clock code" it will harm the allies not at all to explain it here for future reference when we reread these brief monotonous lines. The "clock code" is a series of imaginary concentric circles with the "O.K." or target placed directly in the center point. "12 o'clock" is due north, in the imagination of the aviator, of course. So when a shell hits at any spot other than "O.K." a correction is sent down according to the hour in the direction of the burst and its distance away from the target. For instance a shot due East at 300 yds. would be indicated back to the gunners by the signal D3, meaning at "3 o clock" (due East) near the 300 yd. line. So with the shift of the range of fire the mark is approached closer each time until the