Something to keep in mind: No one has done anything like this at such a scale yet and Germany has formidable resources, not just a lot of money but also a big and capable engineering base. Perhaps it's going to go like some predict and innovation isn't going to be able to solve the issues along the way and everything will effectively run on overpriced gas and coal, but it might as well become a big success story. As a species, we are in pretty dire need of such a success story, so I'm pretty stoked to see this play out. Besides, it's really nice to see Germany do something visionary and daring once in a long while. The Merkel governments have been dire in this regard.

They used 142 BCM in 2021. That's 339 million cubic meters per day. The biggest LNG carriers can handle 200,000+ per shipment. That's 1695 per day... there's only 170 ships active per world wide out of the 439 currently operating.

I think these numbers are correct but maybe I am wildly off...

To continue the napkin math and assuming your calculations check out... Lets say the distance is 7000km and the avg. speed is 12 knots. You'd need less than 30 tankers to have a daily delivery of gas.