Hi, just as head's up, I'm not the submitter but I spotted quite a few Star Trek ships that were listed under one of the TV show fandoms but are definitely crossovers:

Kira Nerys/Ro Laren (ST: DS9) -> Kira Nerys is from DS9 and Ro Laren from TNG
Kira Nerys/Ro Laren/B'Elanna Torres (ST: DS9) -> as above, plus B'Elanna Torres is from Voyager

Ro Laren/B'Elanna Torres (ST: V) -> as above, these characters are from TNG and Voyager respectively
Sarina Douglas/Seven of Nine (ST: Voy) -> Sarina Douglas is from DS9 and Seven is from Voyager

Beverly Crusher/B'Elanna Torres (ST: TNG) -> Beverly Crusher is from TNG but B'Elanna Torres is from Voyager

Raffi Musiker/Seven of Nine/B'Elanna Torres (ST: Picard) AND Raffi Musiker/Seven of Nine/B'Elanna Torres/Zani (ST: Picard) -> these are all ST: Picard characters except for B'Elanna Torres who is from Voyager