Which scale is considered a coastal chart...

🔍 Key Concepts

• Chart scales and what the ratio (e.g., 1:25,000) tells you about detail vs. area covered • The typical scale range used for coastal / inshore navigation versus harbor or ocean plotting charts • How "smaller" and "larger" scale charts are described in navigation (more zoomed-in vs more zoomed-out)

💭 Think About

• Which of these scales would give you enough detail to safely navigate close to the coast but not necessarily inside a harbor? • Which scale would be more appropriate for planning an offshore passage rather than following the shoreline? • Arrange the four choices from most detailed to least detailed and match that to the idea of coastal navigation.

✅ Before You Answer

• Verify which scales are normally associated with harbor/approach charts (very detailed) versus coastal charts (moderate detail). • Check which scale(s) are often used for offshore / small-scale navigation where only a large area overview is needed. • Make sure you understand that a chart with a denominator of 500,000 shows much less detail than one with 25,000.

Which scale is considered a coastal chart used for inshore coastwise navigation?

not more than 1:25,000

1:35,000

1:100,000

1:500,000