chain

noun, (Surveying) a jointed measuring line consisting of one hundred linked metal rods, its length (66 ft., approx. 20 m) (COD)

“I think there were generally ten chains, ten chains wide, and a chain is 66 feet, so 665 feet wide and then a hundred chains long, so that’s over a mile long.”

“He said the lots [on the north of the Island] have ten chains each. Like they’re on a bit of an angle, so instead of being ten chains, they were like 10.1 or 10.3 or something like that. And some of them were maybe slightly below ten. They’re all laid back, and it looked like they were all the same distance in length, so that when the shoreline varied, the back end of them varied too.”