@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