Radar dilemma

[pugwash]

I use a Yeoman Plotter to pinpoint position on chart and don't worry about waypoints. My Tiller Pilot is not networked.

My radar operates on "Head Up" but when I try to convert to "North Up" it sends a message saying something like "heading data required." I have searched through the manuals and I can't see how to do this.

Any thoughts would be welcome. Thanks.


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[pvb]

"Heading data required" means it needs to be hooked up to an electronic compass so that it knows which way is north. For a stable image, you really need a rate gyro compass, which is around £500.

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[duncan]

doesn't the Yeoman have an NMEA output?
You could connect this to the radar and this will provide it with sufficient info to display North Up.
However I would have to echo the view that without a gyro compass the variation and timing responses you will experience rather makes the whole ting achademic - ie the main reason to show north up is to have a stable image.

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[pvb]

Yeoman output...

I'd have thought that the Yeoman will only output waypoints, as it doesn't have any way of detecting heading.

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[Jools_of_Top_Cat]

Why do you need a rate gyro compass rather than just a stabilised fluxgate. If it is to damp the boats pitch and yaw then surely electronic damping which most fluxgates can do will be similar.

I read somewhere recently, I can't remember where, that rate gyro compasses were over rated for the purpose anyhow and don't waste your money.

Do you have a rate gyro, did you have a normal fluxgate previously, did you notice a great improvement? That is an open question to anybody.

Do I 'need' a rate gyro compass on a cat, she does not heel and is not as twitchy as a mono, i.e. my central pivot point moves much more slowly during turns.

Any experience welcome. I have been getting acceptable results with GPS alone while deciding which compass to buy!

<hr width=100% size=1>Julian

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[petery]

Re: Yeoman output...

...or even COG when the boat is 'stationary'

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[duncan]

Re: Yeoman output...

my apologies I had a brief moment there as all the Yplotters I have seen in use have been interfaced with a GPS signal.

however this will only give you a COG rather than a proper heading and althought the Radar unit will use this to calculate and show a north up picture it may well be closer to 'NNE/NNW up' on occasions!

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