MCA 032-73 Navigation Practice Questions - MCA SQA Chief Mate-Master Unlimited Paper 032-73 - Navigation Exam

Why is a gnomonic chart used together with a Mercator chart for ocean voyage planning?

Gnomonic charts show rhumb lines as straight lines for steering only Great-circle tracks plot as straight lines on a gnomonic chart and can then be transferred to a Mercator chart as a series of rhumb-line legs Mercator charts cannot display latitude and longitude Gnomonic charts replace ECDIS for coastal pilotage

Correct Answer:

Great-circle tracks plot as straight lines on a gnomonic chart and can then be transferred to a Mercator chart as a series of rhumb-line legs

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