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Questions and Answers
Which symbol is used to indicate a fix on the chart?
Which symbol is used to indicate a fix on the chart?
- A dot surrounded by a circle (correct)
- A dot surrounded by a small triangle
- A small line across the course
- A small cross
What symbol is used to represent the Dead Reckoning (DR) position?
What symbol is used to represent the Dead Reckoning (DR) position?
- A dot surrounded by a small triangle
- A dot surrounded by a circle
- A small line across the course being steered (correct)
- A small cross
How is an Estimated Position (EP) shown on the chart?
How is an Estimated Position (EP) shown on the chart?
- A small cross
- A small line across the course
- A dot surrounded by a small triangle (correct)
- A dot surrounded by a circle
What additional information is typically noted alongside a fix symbol on a chart?
What additional information is typically noted alongside a fix symbol on a chart?
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What might be added to a fix to indicate it has been obtained by a method other than visual bearings?
What might be added to a fix to indicate it has been obtained by a method other than visual bearings?
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Which method uses a small cross to originate if a fix or Estimated Position is not available?
Which method uses a small cross to originate if a fix or Estimated Position is not available?
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Study Notes
Chart Work Symbols
- Positions: A fix is represented on the chart by a dot surrounded by a circle, with the time alongside, and position lines passing through the fix if necessary, and may have a suffix to indicate the method used to obtain it (e.g., not by visual bearings).
- Dead Reckoning (DR): The DR position is shown on the chart as a small line across the course being steered, with the time alongside, and may originate from a small cross if a fix or Estimated Position is not available.
- Estimated Position (EP): The EP is represented on the chart by a dot surrounded by a small triangle, with the time alongside, and the ground track of the ship passing through the dot.
Additional Information
- Standard symbols should be used for all forms of chart work to ensure clarity and understanding among all who practice it.
- Common chart work symbols are detailed in the Manual of Navigation, Appendix 9.
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