|Square Root of 2 Maritime Flag: 1.41421|
One point, four, one, four, two, one is the square root of two. By the good fates, it neatly packs itself into a Maritime Flag. Since the number one is coded to a red disc and four is a white cross on a red field, it smoothly makes a good flag up to the 100,000th thousands place which is also a one, which is why there is a red dot in the center. Just see the pic below to understand how the Maritime Square Root of 2 flag works.
Basically each number down a decimal place must fit within the upper number, so as to make this pattern.