🔍 Key Concepts

• Large-scale vs small-scale charts (which one shows a smaller area in more detail?) • Typical use of harbor charts (close‑in navigation, piers, channels) • How chart scale numbers relate to detail (1:25,000 vs 1:150,000, etc.)

💭 Think About

• Which scale would give you the greatest level of detail for tight maneuvering in a harbor: a large denominator or a small denominator? • Think about which kind of chart you would want when navigating among buoys, docks, and narrow channels—would that chart cover a big coastline or a very small local area? • Compare each option: which ones look more appropriate for offshore/coastal planning, and which look better for close‑quarters work?

✅ Before You Answer

• Confirm that a large‑scale chart means a small area with lots of detail (smaller second number). • Identify which answer choices have the smallest denominator (most detail) and which have the largest denominator (least detail). • Eliminate any options that clearly describe broad coastal or ocean areas, not a confined harbor.