🔍 Key Concepts

• IALA Maritime Buoyage System – Understand what a safe water mark indicates compared to lateral or isolated danger marks • Color and pattern: how red/white vs black/red/black/white schemes are used for different buoy types • Light characteristics: know which mark type uses Morse (A) and which use quick or interrupted quick flashing

💭 Think About

• First, recall what a safe water mark means on the chart and in the buoyage system: is it danger, channel edge, or safe water all around? • Match that function with the typical shape, color pattern, and topmark you remember for safe water buoys. • Then, think about which type of aid typically uses Morse (A) as its light character versus which types use quick or interrupted quick flashing patterns.

✅ Before You Answer

• Verify which buoy type is described as indicating safe water all around (not danger and not channel edge). • Check which color scheme is associated with that buoy: is it red/white or black/red/black/white? • Confirm which light characteristic goes with that mark: Morse (A) or interrupted quick flashing.