Until that moment, my Konel DL-155 D-X Loran A was among the most sophisticated electronics aboard Bonne 'Etiole, my Irwin 46 ketch. The unit had a small, green phosphor CRT screen and was festooned with 15 control knobs—12 of which had to be adjusted to determine a single line of position. The process involved me looking for a single "blip or, as it was occasionally called, a "blade of grass, that was motionless against a screen of hundreds of rapidly moving blips. Then I had to fiddle with the knobs to center and magnify the signal, and adjust the controls to superimpose two images. After accomplishing this, I had to record the positions of the three station control knobs, along with the five numbers that appeared in the "delay windows. That gave me a single line of position I could locate only on a properly annotated chart. Since the line of position usually did not coincide with one of the plotted lines, I had to use the Loran Linear Interpolator printed on the chart's margin. Repeating this process once or twice helped me obtain the additional lines of position needed to define a fix, or in the case of a fast-moving boat or aircraft, a moving fix.