🔍 Key Concepts
• NOAA chart scale categories (harbor, coastal, general, sailing) and their typical scale ranges
• The meaning of chart scale numbers (large-scale vs small-scale)
• How a 1:45,000 scale compares to very detailed versus very broad area coverage
💭 Think About
• Is 1:45,000 considered a large-scale (more detail, smaller area) or small-scale (less detail, larger area) chart?
• Which chart type is normally used closest to land and in confined waters, and which is used far offshore for long passages?
• Where does a mid-range scale like 1:45,000 logically fit among harbor, coast, general, and sailing charts?
✅ Before You Answer
• Be clear on large scale vs small scale: a denominator like 10,000 vs 80,000 vs 600,000
• Recall the approximate scale bands NOAA associates with harbor, coast, general, and sailing charts
• Ask whether a 1:45,000 chart would more likely be used for approaches and nearshore navigation or for ocean passage planning