20. At 0250, Great Machipongo Inlet Light «5» (37°21.8'N, 75°43.7'W) bears 279°pgc. At 0320, the light bears 320° pgc. If you are making good 6.5 knots, what is the position of your 0320-running fix?

The running fix is determined by advancing the earlier line of position by the distance run between observations and intersecting it with the later line of position. The distance run is calculated by multiplying speed by time, resulting in 3.25 nautical miles. Plotting the advanced 0250 line of position and the 0320 line of position yields a fix at LAT 3718.10'N, LONG 7539.55'W.