When piloting a vessel, how are visual references used to establish a constant rate of turn?
• Relative bearing of a fixed object while your vessel is turning • What it means for a bearing to remain constant, to open, or to close • How a steady change over time relates to a constant rate of turn
• When your vessel is turning, what does it look like on the compass or pelorus if you are turning faster versus slower with respect to a shoreline object? • If a fixed object is staying on the same relative bearing as you turn, what does that tell you about the relationship between your heading change and your movement around that object? • How would the relative bearing behave if your rate of turn were increasing or decreasing instead of staying constant?
• Make sure you understand that relative bearing is measured from your ship’s bow, not true north. • Think through what happens to the relative bearing of a fixed object when you turn at a steady (constant) rate versus when you speed up or slow your rate of turn. • Verify which option correctly links the behavior of the relative bearing (stays the same, opens, or closes) with maintaining a constant rate of turn.
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