Why do US amphibious assault ships operating STOVL aircraft not use ski jumps?
Short answerInstitutional and congressional politics may matter because a successful cheaper ski-jump carrier would invite comparisons with the much more expensive supercarrier force.
NotesThe United States has experience with ski-jump concepts and could fit one when required. A suggested explanation for omitting the ramp is political and institutional: adding it to an amphibious assault ship would make the carrier role more visible. Congress might then ask why a ship able to launch F-35Bs costs so much less than a Ford-class carrier. Plans may also exist for rapid wartime installation even when a ramp is omitted in peacetime.