Measurement of Course

The GPS signal contains no information on the direction in which the boat is moving. Because the GPS receiver knows the shape of the Earth, it can determine the direction that it has travelled from one fix to another. This course over the ground (COG) is exactly what it says and may not be the same as the course steered by the boat.

Fix at 0903

Because the GPS receiver knows the shape of the Earth, It can calculate the bearing of the second fix from the first. It Is thus capable of calculating the course over the ground (COG)

Fix at 0903

Because the GPS receiver knows the shape of the Earth, It can calculate the bearing of the second fix from the first. It Is thus capable of calculating the course over the ground (COG)

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