When someone steps onto a giant iceberg are they going “aboard” or “ashore”? Or is “aboard” reserved for man-made things like ships, boats and vessels?
What about a glacier that is floating on the sea and has not yet broken from the land it formed on? “Ashore” seems to work here at least until it calves.
To rephrase: if “aboard” is for man-made things and “ashore” is for things attached to land then what word is used for stepping on free-floating ice?