The CQ-80.
☆ NintendObs Weekly – Monday, April 2, 2018 – Sunday, April 8, 2018.
The CQ-80 is an essential tool for exploring the underground test facility. When aboard a Deepsea Metro subway train, you can use the CQ-80 to view the subway map. Choose a station on the map, and the train will take you there.
— Squid Research Lab
Source: Splatoon’s Tumblr.
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