🔍 Key Concepts

• Magnetic variation (declination) information on a nautical chart • Where to find details about compass roses and their notes • How isogonic lines show magnetic information over an area

💭 Think About

• For each option (A, B, C), picture an actual paper chart you’ve used: where have you seen magnetic variation data written or drawn? • How does the compass rose relate true north to magnetic north, and where is that relationship actually described on the chart? • What do isogonic lines represent, and are they directly tied to magnetic information or something else?

✅ Before You Answer

• Check where the variation value and annual change are normally printed on a chart. • Confirm whether compass roses include magnetic and true bearings and a note about variation. • Verify what isogonic lines connect across the chart (same variation? same deviation? something else?).