Wight Dawn wrote:Storyline, I also have used Antares charts to enter places which I would have been hesitant to enter without them. Which worries me as if Uncle Sam messes with he sattelites, I would be right up the creek. Literally. Unless they messed with them in a big way as the mark one eyeball would keep me right. Places where the tablet has eased my mind include Castle Tioram, entering loch Eishort and getting into the wee anchorage in Loch Scavaig to go and see Loch Coruisk.
If you are concerned about the gps accuracy (and with some of the Antares charts it is so tempting to rely on it) then there is a useful little app that monitors solar storms and warns you when the gps accuracy is likely to be compromised. This happens more often than one would think. The app sits in the status bar of your phone and consumes very little overhead. Just one downside, you need a phone connection but as it checks regularly the chances are it will update as you sail in and out of reception. Not much use if you stay put in one place without reception (which is my type of anchorage
K-index Monitor by bizztrade
During our recent cruise we were astounded how accurate the gps/Antares combo was on our phones (Moto G). The weather was fantastic so we spent a few days messing around in the Ardmores. Some of this was playing in the dinghy with the leadline and the Antares charts. Reckon we were reliably getting accuracy of 2-3 metres which seems better than you would expect.
You say you went into Moidart up to Castle Tioram, how much do you draw as the last time we went in we were in our old boat which only drew 4' ? Even then we very nearly touched in places so I had mentally written the place off as we now draw 6'. Had not thought of using Antares to help getting in but anyway I am not is a rush to go back as last time we were there we got gale bound and spent 5 days & nights staring at that dammed castle ! It was the year of the coastguard strikes so no weather forecasts and there was no phone signal. This conveniently coincided with a series of deep lows and is the reason we have now got Navtex.
Edit: have just looked at the Antares charts and it was the bar to the n/w of Riska where we nearly ran out of water. There should be water there (just) so maybe it was neaps (will have to look at the log book).