Determine the course per standard magnetic...

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Question 1 of 2066636eea28f7522a1c51b0a7

Determine the course per standard magnetic compass from the entrance to Ninigret Pond (LAT 41°21.3'N, LONG 71°38.3'W) to the entrance to Great Salt Pond on Block Island.

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Question 1 of 20

66636eea28f7522a1c51b0a7

Determine the course per standard magnetic compass from the entrance to Ninigret Pond (LAT 41°21.3'N, LONG 71°38.3'W) to the entrance to Great Salt Pond on Block Island.

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🔍 Key Concepts

• Great-circle vs. rhumb line direction between two positions on a chart • How to convert from true course → magnetic course → compass course using variation and deviation • Careful plotting of positions using latitude/longitude on the correct chart scale

💭 Think About

• First, on a chart, plot the two entrances using the given lat/long and draw the straight rhumb line between them. What is the approximate true course you measure? • Next, what is the local magnetic variation in this area, and is it east or west? How does that affect the relationship between true and magnetic? • Finally, what deviation would you apply for that magnetic heading from the deviation table, and what approximate per standard compass course does that give you?

✅ Before You Answer

• Be sure you are using the correct entrance positions for both Ninigret Pond and Great Salt Pond (not buoys or inner marks). • Double‑check that you applied variation with the correct sign ("east is least, west is best") when converting true to magnetic. • Confirm you applied deviation in the correct direction when going from magnetic to standard compass, and that your final answer is close to one of the choices given.

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Question 1 of 2066636eea28f7522a1c51b0a7

Determine the course per standard magnetic compass from the entrance to Ninigret Pond (LAT 41°21.3'N, LONG 71°38.3'W) to the entrance to Great Salt Pond on Block Island.

Back

Question 1 of 20

66636eea28f7522a1c51b0a7

Determine the course per standard magnetic compass from the entrance to Ninigret Pond (LAT 41°21.3'N, LONG 71°38.3'W) to the entrance to Great Salt Pond on Block Island.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed