USCG Exam PracticeLight List, ranges, and light characteristics
A light exhibiting the Isophase (Iso) characteristic is best described as having which property?
- A. Duration of light shorter than duration of darkness
- B. Duration of light longer than duration of darkness
- ✓ Equal durations of light and darknessCorrect
- D. A fixed light with a superimposed brighter flash
Why C is correct
Isophase (Iso) is defined as a light with equal periods of light and darkness. This distinguishes it from both Flashing and Occulting characteristics.