I haven't found any airdrop maps for Ireland yet so here's the few I've found so far. It'd be a big help for everyone if anyone could mark other spots they've found as well

I've got:

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The bridge in Athlone

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The ravine north of Cashel

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The south field of Newmarkets Homestead

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It's reasonable to guess there will be ones in Dublin Moneypoint and Fort Dunree but I haven't seen them yet

Edit: there have been a few that I missed- either because I've been far off on an island or it's been snowing and I couldn't see the drop plane. Also, what's with the snow? I've seen it snow on this map more than I've seen it rain and as an Irish person myself this is probably the least authentic part of the map lol