JOTUN-S5-27631 was a Series 5 model of Farming Machinery made by Jotun Heavy Industries. Like most of the JOTUNs named at the end of Halo: Contact Harvest this one held a fragment of Harvest's agricultural operations AI, Mack. This particular machine was used by the AI to track CMA Argo and attempt to warn it away from Harvest, but to no avail as it was destroyed by the Covenant.