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BroadHopper · 09-12-2017, 06:43 AM

Regardless of the current, wind etc. The GPS speed is the exact speed you are traveling from point A to B. Your boat speedometer does not compensate for this.

If the MP clock you with a laser gun it will get you theoretically the same reading as a GPS speed. Angle of boat, surface reflections etc does throw the accuracy off.

If the MP reads your speed by eye, i.e. the size of your wake, this is essentially the same as reading your boat speedometer.

The major problem with the headway speed (6 mph) law is that it does not state whether it means the traveling speed from point A to B or if it is the speed of the boat going from point A to B in regards to conditions.

Savvy?

09-12-2017, 06:43 AM	#57
BroadHopper Senior Member Join Date: Oct 2004 Location: Laconia NH Posts: 5,569 Thanks: 3,202 Thanked 1,101 Times in 793 Posts	GPS Speedometer Regardless of the current, wind etc. The GPS speed is the exact speed you are traveling from point A to B. Your boat speedometer does not compensate for this. If the MP clock you with a laser gun it will get you theoretically the same reading as a GPS speed. Angle of boat, surface reflections etc does throw the accuracy off. If the MP reads your speed by eye, i.e. the size of your wake, this is essentially the same as reading your boat speedometer. The major problem with the headway speed (6 mph) law is that it does not state whether it means the traveling speed from point A to B or if it is the speed of the boat going from point A to B in regards to conditions. Savvy? __________________ Someday may never be an actual day.