Lights

Question 1

How would you describe Fl(2)10s72m25M Horn(3)45s?

Answer 1

• White light
• Flashes twice every 10 seconds
• Distance between focal plane and MHWS / HAT is 72m
• Nominal range is 25 miles
• In fog, horn sounds thrice every 45s

Question 2

Dipping distance formula?

Answer 2

miles = 2.08 × (√ (height of eye h metres + √ height of light H metres )