You are on course 090°T when you sight a flashing white light with a characteristic of VQ(9)10s. You immediately change course to 030°T. After one hour, you sight another flashing white light with the characteristic of VQ. You must pass well __________.

Correct Answer: Option D — north of this buoy

The VQ(9)10s light is an Isolated Danger Mark, indicating a hazard with navigable water around it. The second light, VQ, is a North Cardinal mark. Cardinal marks indicate the side of the danger on which to pass; a North mark requires passing to the north of the buoy.