Living within a group of islands, it's important not to take any published transport timetables as gospel truth because acts of God aren't even near the top of the list of things that can go awry. Recently, I was tasked with carrying out a repair in North Ronaldsay, one of the smaller islands within the archipelago, which is a 15 minute plane journey or a two and a half hour boat trip from Kirkwall. I was requested to attend on a Saturday and went to book a return flight which would suit. Loganair could fly me back in the afternoon, but there was no room on the outward plane in the morning. Not to worry, I could catch the early morning ferry, which would see me in North Ronaldsay by about half ten. What no-one could have possibly predicted was another ferry having a technical issue, the timetable being rejigged and my sailing being pushed back until after lunch, all of which would get me to the island just in time to catch the plane home. Oh well, let's make a new plan for ...