It's Ireland. It's very easy to replicate the weather conditions.
Less facetiously, I think that is a great idea. I wonder if with the sharp vertical extent and it's proximity, and it's stealthy qualities, Blackrock looked very similar at 1nm to the Carrick Islands at this point .2/3nm away. If the crew could rationalise away the Carrick Islands, then it would be easy to do the same for Blackrock.