Alternate timeline
(covers information from an alternate timeline)

Cetacean Ops was a facility on board the USS Enterprise-D, in an alternate timeline created by a time traveling USS Enterprise-C.

Doctor Joshua Kim was ordered to report to this facility, shortly after the Enterprise-D encountered a temporal rift. (TNG: "Yesterday's Enterprise")

The term "Cetacean Ops" was only heard in the "background chatter" during the episode. The facility might also exist in the regular timeline as dolphins are mentioned to be aboard the ship in "The Perfect Mate". To date, the facility has never been shown on screen. Conceptual artwork at Andrew Probert's website shows that the facility may be have been featured in the original version of Star Trek Online. The subtitles for the episode on streaming services including both Netflix and Amazon, as well as the TNG Season 3 Blu-ray release, give the facility's name as "station Ops."
According to the 1996 reference book Star Trek: The Next Generation USS Enterprise NCC-1701-D Blueprints, lifeboats for the cetacean ops crew were located on deck 13. [1]
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