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