The distance between any two meridians...

🔍 Key Concepts

• Meridians vs. Parallels – meridians run north–south, parallels (latitudes) run east–west • On a parallel of latitude, east–west distances relate to a specific navigation term used in plane sailing • Relationship between difference in longitude (angle) and the actual miles between meridians at a given latitude

💭 Think About

• Are we being asked for an angular difference (in degrees) or a linear distance (in miles)? Which term is defined as miles along a parallel? • When you move east or west along a given latitude, what do navigators call the distance you have made between two meridians? • Which option is normally measured in degrees of arc, and which is normally measured in miles on the surface of the Earth?

✅ Before You Answer

• Identify which choice is specifically defined as distance in miles along a parallel of latitude between two meridians • Separate terms that describe angles (in degrees) from those that describe linear distance (in miles) • Confirm from your formulas in plane sailing which quantity is found using Difference of Longitude × cos(latitude) and what that quantity is called

The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.

departure

difference in longitude

meridian angle

mid-longitude

🔍 Key Concepts

💭 Think About

✅ Before You Answer