I did my yacht dressing by using common guideline to respect all national flags by leaving look-alike away.
The picture here is correct by flag setup, except the first flag is in the deck. that’s simply because when this picture was taken – I was measuring the correct length.
SPV says :
A, B, C, 1, D, E, F, 2, G,
H, I, 3, J, K, L, 4, M, N, O, 5, P, Q, R, 6, S, U, V, 7, W, Y, Z, 8, 1st korvausviiri,2nd korvausviiri, 3th korvausviiri.
Gettysburg site says :
AB2, UJ1, KE3, GH6, IV5, FL4, DM7, PO Third Repeater, RN First Repeater, ST Zero, CX9, WQ8, ZY Second Repeater
There is several guidelines for so called celebration flag setups. One official found http://spv.fi/wp-content/uploads/2017/01/Liputusohje-12.pdf which is not correct. Other pretty decent is found from https://www.gettysburgflag.com/blog/flag-information/dressing-ships/. This maybe a good point to start a research https://en.wikipedia.org/wiki/Dressing_overall