Drying heights and chart plotters

[DPH]

Having used a plotter for a year now I'm most impressed with it apart from it's total lack of displaying drying heights. Is this a common fault or is it peculiar to Simrads?
...or is it the C-Map catridges?

There are quite a few places in France where access is only around high tide, I find it quite un-nerving that the chart plotter becomes pretty useless once your over anything that drys. Can't remember where it was in France but the last 2 miles were all over drying land, no idea how much water should have been under me. All the plotter shows is green with no heights. As it turned out we had 3 meters all the way to the lock.



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[Wiggo]

Our Ryamarine/C-Map NT+ setup shows drying heights...

<hr width=100% size=1><A target="_blank" HREF=http://homepage.ntlworld.com/graham.wignall/boats/eulimene600x800.jpg>The old and the new</A>

 

[DPH]

Did you have to set this up? Mine is a CA42, don't know if the new ones are different.

I've only really used the default settings on the plotter, and have to confess I havn't looked at the manual.



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[hlb]

Well my old Raythion does show drying heights. You sure you have the right chart for the area??

<hr width=100% size=1> Get Yer Flags ear</font color=red>
Haydn

 

[DPH]

Yes I've got the correct chart, it's a super wide plus jobby that covers both sides of the channel.

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[Wiggo]

Don't think so. It is all on defaults, AFAIK.

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[DPH]

Must be something up with my setup. Will have to read the flippin manual!



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[hlb]

Well anyway a chart plotter wont tell you if the tide is in or out. You have to work that out yerself. You not got a paper map thingy and pilot book???

<hr width=100% size=1> Get Yer Flags ear</font color=red>
Haydn

 

[Wiggo]

Has to be said, as a general principle, I try to avoid driving over the green bits... Blue is good, white is even better.

<hr width=100% size=1><A target="_blank" HREF=http://homepage.ntlworld.com/graham.wignall/boats/eulimene600x800.jpg>The old and the new</A>

 

[Wiggo]

Desperate measures, indeed. Does it show depths, BTW?

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[DPH]

Yes it shows depths, in fact everything else is perfect. It's just the lack of drying heights that annoy me. I'd just assumed this was something that was a failure of the chart plotter.

Will try and get down tonight and see what I can suss out.


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[DPH]

Actually the plotter does tell you if the tide is in or out plus the tidal curve although this is seen in a seperate window. Use McMillans and yes I do the calculations. Obviously paper chart as a back up and the channels are normally buoyed, but I'd still prefer the drying heights on the plotter as another failsafe. i.e. Entering at HT +/- 1 hour should give me 7 meters of tide so drying heights of say 5 meters would be acceptable.

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[Tomsk]

Could this be because you are using a SuperWide chart cartridge? In order to cram more chart on do they not remove some details?

<hr width=100% size=1>Tomsk -

What the hell... it's only money!

 

[rickp]

I don't believe that they remove details on the Superwide cartridges. The cartridges themselves hold more. My Superwide c-map cartridge shows drying heights quite happily on a raymarine plotter.

Rick

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[jfm]

CP42

Dave it must be the set up on your plotter. Unfortunately the CP42 is a b*gger to set up, it's not at all intuitive, you need the manual and that's not very clear either. I had one for 4 years and didn't really know how to use it by the time we sold it......

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[DPH]

Re: CP42

Hmm, spent an hour on the boat last night trying to suss this out. Results as follows.

Looking outside the lock at port solent in the green part of the chart I did notice a few black dots here and there. If I move the cursor over a dot and select chart info it does indeed say Drying height, and something like -1.9999957, which I thought was a bit accurate!

So conclude that data is on the chart but the plotter will not display it on screen, have to select it manually which is a bit of a pain. Did read the manual but no mention of drying heights anywhere. Think call to Dimrad is in order.

Incidentally, looked at the chart for Paimpol, France where the last 2 miles are over drying heights, didn't seem to be any data for the drying heights though.





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[woodie1000]

Re: CP42

I think you'll find the drying heights only appear before 12pm...and I understand you are rarely up before then...you should try it one day!

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