Harvesting Bay
Concept · Stellaris 4.5.2
Harvesting Bay in the Stellaris encyclopedia: - Building Slots: +3
Harvesting Bay in the game's words
The encyclopedia entry as the game shows it in its tooltips; underlined words open their own entry or page here.
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Building Slots: +3
- Astro-Harvester Jobs: +200
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Arkship Decks are Specialized into 
Harvesting Bays
Reserving dedicated arkship space for the collection and triage of harvested resources offers a higher yield thanks to the opportunity of in-gravity operations and the use of more streamlined machinery.
Source: common/game_concepts (concept_zone_ark_harvest) and localisation/english, Stellaris Cygnus v4.5.2 (9776).