Paul, Thank you and I had seen that Wiki reference, but I was after Mairan T, not the lunar impact crater, Mairan, it’s a bit confusing. I’m interested in the lunar volcano, designated as ‘the silicic volcano Mairan’. Interestingly some descriptions give this as an impact crater or crater, but it’s not, more a collapsed volcano caldera.
I quoted the location of Mairan T as given in that article!
The location of Mairan itself is given as 41.6°N 43.4°W in Wikipedia.