Ok, slight variation on these scenarios. If you had an Audax route that involved a ferry as the only viable option to get across a river, yet for reasons the ferry was out of service, if there were no bridges in a sensible cycling distance, would back tracking 10k to a station, taking a train across the river, getting off at the first station, cycling back to the ferry terminal on the new side of the river, and then continuing on with the route, be acceptable, if you made no claim for extra time, and just swallowed the extra distance, would this be accepted, say on a DIY (I'm assuming on a calendar event this would be tripping up a lot more people, and the org would likely have a view) ?
J