Did ships with a carrier-like concept exist before later support-carrier ideas?
Short answerHMS Unicorn was a forward aviation-support ship, and other vessels had similar support-oriented purposes rather than being standard fleet carriers.
NotesHMS Unicorn was built as a forward aviation-support ship. Its role differed from that of a conventional fleet carrier. A carrier-like hull could support naval aviation without serving as a standard frontline carrier. Other vessels served similar purposes, though none is identified.