Sonar Quiz #39

So what exactly is COG ..??

How is COG actually obtained by the unit ...??

And when can it benefit you on the water ... ??

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Rickie

COG is course over ground, I read that in the manual. I'm assume its the heading of your boat? I'm new in learning on these fancy fish finders. I say its based off your GPS position and could be used in a way point in marking fish?

Course over ground calculated by the GPS relative to the ground. Will vary from a compas heading because compass is giving a reading based on direction boat is facing. COG can be influenced by wind or current pushing boat sideways. On the water best use I can think of is in navigating from one point to another. Understanding the difference could keep you out of trouble.

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Originally Posted by cray

Course over ground calculated by the GPS relative to the ground. Will vary from a compas heading because compass is giving a reading based on direction boat is facing. COG can be influenced by wind or current pushing boat sideways. On the water best use I can think of is in navigating from one point to another. Understanding the difference could keep you out of trouble.

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I love the US Navy......

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Originally Posted by fishervet

I love the US Navy......

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Thanks, Tye I think:Rofl

COG is that silly box that Humminbird won't let me turn off.

Center of gravity. Tells you if the boat is level

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Originally Posted by Tundah

COG is that silly box that Humminbird won't let me turn off.

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I like this answer ... :-;
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I'm working on a diagram for explaination ...

Rickie

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Originally Posted by cray

Course over ground calculated by the GPS relative to the ground

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Very good guys ...

COG is determined by the unit's GPS function of comparing the present boat GPS position (Lat/Log) with the previous boat GPS position (Lat/Lon) to give direction of travel ...

Attachment 275043

This is why the Course Projection Line disappears when the boat is stationary ... Because the unit's GPS is not determining that the boat's present GPS position (Lat/Lon) is any different from the boat's previous GPS position (Lat/Lon) ...

COG can help you know which direction your boat is traveling without even without knowing your relative awareness of where you are on the Earth ...

In the above depiction ... The boat is traveling 21° from Due North (North is 0/360°) ...

Rickie

Just saw this one. Interesting... Oh; by the way, I didn't really understand COG. Until now. Good answers... Thanks Rickie. Terry