The “vomit comet” moniker was earned by the first generation SeaCats. Current designs are much larger, leading to a smoother ride. As an advocate for using current gen hydrofoils put it:
“…yet many of them still refer to the 74-metre, 3,000GT, SeaCat Tasmania of 1990 as the “spewcat” or “vomit comet”. That is as ridiculously unfair and dishonest as comparing a Short Sandringham flying boat with a Boeing 747. The next Incat ferry to be built will be 120 metres and 13,000 plus GT.”
(See: tinyurl.com/2j8qdkh7)
But does it make sense to compare a surface craft with an aircraft?