You can order any sail letters and numbers via
Negrinautica who will be on site supporting the event. Sail numbers and competitors national letters will be provided with charter RS Aeros.
Fantastic to have entries from 11 countries this year! National flag sail stickers will be available at the
Fraglia Vela Malcesine reception for 5 Euro. One is required on the port side or sailors can choose to have two back to back.
Check the Class Rules C.10.4 and Annex 2 for size and positioning;
https://www.rsaerosailing.org/docs/699705696.pdf