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Go Back   SailNet Community > Skills and Seamanship > Seamanship & Navigation
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Seamanship & Navigation Forum devoted to seamanship and navigation topics, including paper and electronic charting tools.


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Old 03-17-2014
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B&G T7 for Newport 30

I just bought a new Nav system B&G T7 touch. It is very nice and per the manual it will do about everything. BUT how do I get familiar with it. The learning curve is very steep. I have been out a couple of times and had failures a couple of times. Once it just keep shutting off, needed a cold reboot The next time the GPS stopped working? I got it back but both failures should not have happened I worked through them back at the dock.
Does any one have any recomendations for learning aids. I woul really like to be able to use 90% of this machine. The manual kind of sucks.
! more question which tech support has ignored so far. What is VMC I can't find a VMG on the machine I can in the Manual but it looks like the VMG on the machine is called VMC. WTF very confusing
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Old 03-18-2014
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Re: B&G T7 for Newport 30

Sounds like two separate problems. Don't think the thing should require cold restart to keep working. Something is F'd up. Learning a new complicated system? Just keep working at it. Sorry, no specific advice.
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Old 03-19-2014
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Re: B&G T7 for Newport 30

I did find a definition for VMC = Velocity Made good for Course. I had never heard it before nor had any one else I talked to It sounds like they made it up. VMG=VMC WTF just something new to confuse me.
I will get i figured out
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Old 03-19-2014
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Re: B&G T7 for Newport 30

VMG is velocity made good to windward (directly into the wind), while VMC is velocity made good to the next mark or waypoint.

So, VMG = VMC only when your next waypoint is directly to windward.
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Re: B&G T7 for Newport 30

VMC
"A measure of speed towards a specific Mark or target, gives actual progress towards a specific point on a course. Often referred to as "VMG to Waypoint". If you see "VMG" on a GPS unit, it is really VMC." from the glossary on B&G web page Still never heard of it except from B&G Couldn't find it in Chapman either. But maybe I just couldn't find it
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Old 03-19-2014
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Re: B&G T7 for Newport 30

Quote:
Originally Posted by fstuart View Post
VMC
"A measure of speed towards a specific Mark or target, gives actual progress towards a specific point on a course. Often referred to as "VMG to Waypoint". If you see "VMG" on a GPS unit, it is really VMC." from the glossary on B&G web page Still never heard of it except from B&G Couldn't find it in Chapman either. But maybe I just couldn't find it
Thanks
Chapman is old..

Your MFD can most certainly give VMG also but it need input from a wind sensor to calculate that.

I can get both from my "old" Furuno.

There are two common reasons for electronics to hang or reboot.
- Low voltage (or voltage drop) on the supply
- Software bugs, most new boat electronics have software that can be upgraded, check if a new SW version is available.
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