One of the questions on the Navigation exam asks for an ETA at Mattituck Inlet. The light list gives that as #20390 and describes it as "buoy 1, green can." There's no position given.
After 10 minutes of frustrated searching, I found it on the chart.
Is there an efficient way to locate a landmark when lat/long are not provided? I know that aids to navigation are numbered clockwise along the Atlantic coast, but that didn't help in this case.
Below No. 20390 (which is the category for Mattituck Inlet) you will find No. 20400 Breakwater Light or Mattituck Breakwater Light which the question is referring to. Here you will find the position of the light to be 41 00.0 Lat 7 33.7 Long. Be sure to do the 30 questions found on page 77 in your Light List.
I hope this helps!