The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?

Correct Answer: Option D — None of the above

In the light characteristic 'Gp Fl R (2) 10 sec 160 ft 19M', '19M' designates a nominal range of 19 nautical miles, not a distinguishing number, radar reflector presence, or a 10-mile visibility limit.