For other uses, see Class O.

In planetary classification Class O or Pelagic planets are those with surfaces comprising 80% or more water. These planets may have some surface land (up to 19%), but it is not a majority feature. In all other regards, Class O planets are identical to Class M planets. A true example of a Class O planet is Argo, while the planet Earth falls just short of the surface water requirement to be considered Class O. (ST reference: Star Charts)

Class O worlds[]

• Argo (Hestalor),^[1] UFC 78856 system
• Droplet, UFC 86783 system^[2]
• Tazi Prime, Tazi system^[3]

Appendices[]

Connections[]

Planetary classification
numeric:	class 9 ("Q'tahL"-class)	alphabetical:	class A class A geothermal class A gas giant
class B class B geomorteus class B gas giant	class C class C geoinactive class C reducing	class D	class E
class F class F geometallic class F geocrystalline	class G class G geocrystalline class G desert	class H class H desert class H geothermal	class I class I gas supergiant ("Q'tahL"-class) class I metallic/silicate
class J class J gas giant class J moon	class K class K silicate/adaptable class K transjovian	class L	class M ("Minshara"-class) class MZ
class N class N reducing class N pelagic	class O	class P	class Q
class R	class S	class T	class Y ("Demon"-class)

Appearances and references[]

Appearances[]

• ST reference: Star Charts
• TAS episode: "The Ambergris Element"
• TTN novel: Over a Torrent Sea
• STO - Klingon War mission: "Tazi System Patrol"

References[]