@sinabhfuil Yes, always #NauticalMiles. Iona Harbour to Ballycastle is 69.6NM. If you are on a typical ~40ft sailboat, you should expect to average around 5kts/hour, so 14-15 hours. Better to do an overnight in #Islay then slog on through - also need to take the tides into account getting down. #RatlinIsland is also a nice little stop just before #Ballycastle

Do #sailors always use #nautical miles rather than kilometres? #NauticalMiles
I ask because I was wondering how long it would take to sail from #Iona to #Ballycastle - apparently about 15 hours; maybe a two-day trip with a short rest at #Islay

7 years ago, I wrote a blog entry about more imperial units, where I suggest new imperial units that convert somehow to metric.

https://wiesmann.codiferes.net/wordpress/archives/30025

Of course, XKCD managed to present a much more compact formula that binds imperial miles to nautical miles…

https://xkcd.com/3023/

#xkcd #imperialunits #measurement #nauticalmiles