Cetacean Ops
Cetacean Ops was the facility aboard various Starfleet starships, during the latter half of the 24th century, which was responsible for ship's navigation. They generally contained an aquarium, so as to simulate the natural habitat of cetaceans.

In 2365, a turbolift door near a holodeck entrance on the  was labeled Tursiops crew facility. Tursiops is the scientific name for dolphins. (; )

In 2366 of an alternate timeline created by a time traveling , Doctor Joshua Kim was ordered to report to Cetacean Ops on the USS Enterprise-D, shortly after the  warship encountered a temporal rift. ()

In 2368, Geordi La Forge gave a tour of the Enterprise-D to the visiting Ferengi, Par Lenor.  As they departed, La Forge asked Par Lenor if he had seen the dolphins yet. (TNG: "The Perfect Mate")

In 2380, Ensign Brad Boimler told Ensign D'Vana Tendi that Cetacean Ops was one of the greatest places on the , which was a  starship. ()

A year later on the same ship, Ensign Barnes invited Ensign Sam Rutherford to join her and "a couple [of] girls from Cetacean Ops" for a swim. ()

Later that year, s Kimolu and Matt were beluga whales who served on the Cerritos in Cetacean Ops. ()

Appendices

Background information 
The term "Cetacean Ops" was first heard in the "background chatter" during "Yesterday's Enterprise". 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." A line in , in which Geordi La Forge mentions "dolphins" on board, may have alluded to the existence of the facility. However, it wasn't until  that it was established that Cetacean Ops also existed in the regular timeline. 

According to the 1996 reference book Star Trek: The Next Generation USS Enterprise NCC-1701-D Blueprints, the cetacean ops facilities, including a cetacean navigation lab and four cetacean lifeboats, were located on Deck 13, with the navigation labs extending into Deck 14 as well.  Conceptual artwork at  shows that the facility may have been featured in the original version of Star Trek Online.

According to the Star Trek: The Next Generation Technical Manual, the ship's dolphins work in navigation and are overseen by two whales of species Orcinus orca takayai, or Takaya's Whales. This references the 1988 anime OVA , where the starship Exelion uses dolphins for navigation due to their natural familiarity with moving in three dimensions; as well as the name of that series' protagonist, Noriko Takaya.

External link 
 
nl:Cetacean ops
Spacecraft sections