They are a series of JOTUNs that are capable of doing a large variety of different tasks. Multi-tasking machines Īlthough their official name is unknown, Johnson saw these in the Harvest's capital city of Utgard. Mack used machines of this series to host himself after the destruction of his data center. It is powered by a three thousand horsepower ethanol-electric engine. The series 5 Gondolas collect crops from the rear of the machine. They were one of the types of JOTUN that Mack used to host his consciousness after his data center had been destroyed.

Johnson and Byrne used one of these to provide a distraction while they snuck up on the Colonial Militia recruits during a training exercise at the Harvest Reactor Complex. Series 4 gondolas collect crops from the sides of the machines. This series was considered obsolete by 2525 and mainly used by smaller farmers on Harvest. There were at least five series of JOTUNs farming equipment and at least one prototype model as of 2525. In 2556, Jotun Heavy Industries was 'Flagged for Review' by ONI after the Sedra terrorist attack. His messages were later recorded in ONI Colonial Security Estimate 2525.10.110.

As the Covenant glassed Harvest, Mack used the JOTUN machines to relay messages to the colony's shipping operations AI, Sif, when both of their data arrays had been destroyed. After the human survivors escaped the planet, Mack transferred himself into the thousands of JOTUNs operating on the planet. During the First Battle of Harvest, Harvest's agricultural operations AI, Mack, used JOTUN cropdusters to knock down a Dextro Xur-pattern Spirit in Utgard.

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