🔍 Key Concepts
• Light characteristics notation on nautical charts (e.g., Fl, Gp Fl, R, period in seconds)
• How to locate Old Point Comfort Light and read its light description in the chart marginal notes or Light List
• Difference between group flashing and a simple composite group period pattern
💭 Think About
• On your chart, find Old Point Comfort Light, then read exactly how the light characteristic is written in the chart abbreviation—how many flashes, what color, and what total period?
• Compare each answer choice’s format to the charted notation: which option matches both the grouping of flashes and the total time for one full cycle?
• Look carefully at whether the pattern is a simple group of flashes or a composite pattern with different intervals—does your charted description show one repeating group, or two different parts in each cycle?
✅ Before You Answer
• Confirm the color shown on the chart (R, G, or W) and eliminate any options with the wrong color.
• Verify the grouping notation: difference between Fl (2), Gp Fl (2), and a written composite pattern like "2s fl 2s ec..."
• Check the period (in seconds) for one complete cycle on the chart and match it exactly with the seconds shown in the choices.