Hello kmpoppe,
Thanks for reaching out! I had initially updated this relation to attraction=boat_ride, as I interpreted the Pitcairn Island tourism website to indicate this as a cruise ship. However, upon closer review, it does mention that the vessel is used for freight and passengers can disembark for short stays on the island. I can restore the tagging to its original state of route=ferry.
I appreciate your insight, and hope you have a nice day!