The only political party that has a manifesto pledge to deal with the Island ferries is the Conservatives - an "all options" commitment in black and white in the Conservative Party 2024 manifesto that no one else can offer.
Other candidates may offer verbal reassurances but their national party don't think the ferries are important enough to commit to print. Vote Bob Seely in Isle of Wight West and Joe Robertson - Isle of Wight East in Isle of Wight East to make sure that firm ferry commitment can be delivered.
You can read the manifesto by clicking this link: Conservative Party 2024 Manifesto.