
Mercator vs. Great Circle Sailing
Rhumb lines vs. Great Circle tracks. Learn exactly when to save fuel and when to prioritize safety on ocean passages.
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Operational guides and navigation theory for Deck Officers

Rhumb lines vs. Great Circle tracks. Learn exactly when to save fuel and when to prioritize safety on ocean passages.
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Stop dragging anchor. Understand the catenary curve, swinging radius, and heavy weather rules for deck officers.
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Gyro vs. Magnetic. A practical guide to Variation, Deviation, and the ABC calculation method for exams and watchkeeping.
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