Nancy Drew: Danger on Deception Island Hints

C = Number of "isophase" buoys surrounding Snake Horse Harbor + 4

  • 1 of 5: An isophase buoy is one where the light on top blinks on and off in even intervals.
  • 2 of 5: Several buoys have lights, but only two of them blink.
  • 3 of 5: And one of them is uneven.
  • 4 of 5: One plus 4 is 5, so ...
  • 5 of 5: C=5