It was still bucketting down with rain and I decided that my car couldn't take another trip around the road to the main cemetery so we had to walk the 1km or so to the tombs. I'd read somewhere that Cairn F had sixe sub-chambers (WOW!), so we headed off to that first. Oh dear! It might have six chambers, but the roof has collapsed and filled nearly all of the main chamber with rubble.
And we are now very wet!
Well, I was at Cairn E, so I had to wander over to F. On a day like today, with ultimate visibility, a clamber on to the top of the cairn is well rewarded. Sitting in the passage (on the rubble) it is possible to work out that it aligns with Cairn E and that the line of site heads towards Benbulbin. Last time I was here I couldn't even see as far as Cairn E!
I would love to see some care and attention paid to this tomb. If the rubble could be removed safely it would be amazing. I don't suggest that anyone tries to start this process as the orthostats would probably collapse from the pressure exerted by the cairn.
This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.
Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.
Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.
The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.
UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.
ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.