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D-5 Class

Size Comp
Universe : Prime Timeline
Affiliation : Klingons
Class Name : D-5 Class
Type : Cruiser (Obsolete) [1]
Unit Run :
Bor'Tas [2] - Destroyed
Klothos [3] - Retired

Estimated 30 built. No longer considered frontline units by 2270; all retired by 2280. plus 28 others built in total. 6 have been lost in all. 24 have been retired from service.
Commissioned : 2120 - 2150, remained in service until 2290
Dimensions : Length : 257 m [4]
Beam : 205 m
Height : 58 m
Decks : 11
Mass : 183,000 metric tons
Crew : 20
Armament : 4 x Mark 5 disruptor cannon, total output 400 TeraWatts
Defence Systems : Standard shield system, total capacity 30,500 TeraJoules
Heavy Monotanium Double hull plus 5 cm Dispersive armour.
Standard level Structural Integrity Field
Warp Speeds
(TOS scale) :
Normal Cruise : 5
Maximum Cruise : 5.5
Maximum Rated : 6 for 2 hours.
Strength Indices :
(Galaxy class = 1,000)
Beam Firepower : 8
Torpedo Firepower : -
Weapon Range and Accuracy : 20
Shield Strength : 11.3
Hull Armour : 270
Speed : 113
Combat Manoeuvrability : 6,510
Overall Strength Index : 51
Diplomatic Capability : 2
Expected Hull Life : 140
Refit Cycle : Minor : 1 year
Standard : 1 years
Major : 16 years


The D-5 class cruiser was in use by the Klingons in the 22nd and 23rd centuries. [2] These ships were the mainstay of the Klingon fleet during that period, and many variations came into service. The basic hull was adapted into a Deuterium tanker model as well. [5]

Colour key

Canon source Backstage source Novel source DITL speculation


# Series Season Source Comment
1 Generic canonical information
2 ENT 2 Judgment
3 DS9 7 Once More Unto the Breach
4 Speculative Approximation, based on window heights.
5 ENT 2 Marauders
Source : Generic canonical information
Series : ENT Season 2 (Disc 4)
Episode : Judgment
Series : DS9 Season 7 (Disc 2)
Episode : Once More Unto the Breach
Source : Speculative
Comment : Approximation, based on window heights.
Series : ENT Season 2 (Disc 2)
Episode : Marauders


Seen in the Enterprise episode "Judgment", the D-5 was markedly superior to the NX class. The D-5 was first mentioned by Kor in "Once More Unto the Breach". It is capable of warp 6. The ship has only been seen firing a single weapon; occupying the space normally associated by the torpedo launcher, this weapon seems more like a pulse disruptor cannon - though it is hard to tell exactly, certainly the Enterprise withstood far more hits from this weapon than it did from the photon torpedoes fired by the D7 in "Unexpected".

The dispersive armour is mentioned as being present on the Bird of Prey design stolen by Malik; I assume this is standard for Klingon ships of this era.

It is hard to judge the size of the D-5, but it looks considerably smaller than the D-7. My estimate is based on the window spacing on the size comparison image.
© Graham & Ian Kennedy Page views : 45,858 Last updated : 20 Sep 2016