Search
Mobile Site Shops eMail Author Caption Comp Monthly Poll Sudden Death Colour Key Statistics Cookie Usage
Ships Fleets Weaponry Species People Timelines Calculators Photo Galleries
Stations Design Lineage Size Charts Battles Science / Tech Temporal Styling Maps / Politics
Articles Reviews Lists Recreation Search Site Guide What's New Forum
8472
Ships

Bioship

Planetbuster
Bajoran
Ships
Assault
Ship

Fighter

Emissary

Kendra

Pagh

Prophet
Solar
Sail

Additional
Borg
Ships

Cube

Probe

Sphere
Tactical
Cube
Transwarp
Prototype

Yacht
Cardassian
Ships

Dreadnought

Freighter

Galor

Hideki

Keldon
Dominion
Ships
Breen
Frigate
Attack
Ship

Battlecruiser

Battleship

Dreadnought
Karemma
Ship
Federation
Ships
Air
Tram

Akira

Ambassador

Antares

Argo

Centaur

Challenger

Cheyenne
Class F
Shuttle

Constellation

Constitution

Constitution

Daedalus

Danube

Defender

Defiant
Delta
Flyer
Endgame
Nova
Endgame
Shuttle

Excelsior
Federation
Class

Raider

Scout

Trainer

Freedom

Gage

Galaxy
Galaxy
Yacht

Griffin

Hermes
Holo
Ship

Intrepid

Kelvin

Luna

Miranda

Nebula
New
Orleans

Niagara

Norway

Nova

Oberth

Olympic
Orbital
Shuttle

Peregrine

Polaris

Prometheus

Ptolemy

Raven
Refit
Galaxy

Rigel

Saber

Saladin

Shelley

Sovereign
Sovereign
Yacht

Soyuz

Springfield

Steamrunner

Sydney
Travel
Pod

Trident
Type 3
Shuttle
Type 6
Shuttle
Type 7
Shuttle
Type 8
Shuttle
Type 9
Shuttle
Type 10
Shuttle
Type 11
Shuttle
Type 15
Shuttle
Type 18
Shuttle
Warp
Sled

Wells
Work
Bee

Yeager

Additional
Ferengi
Ships

D'Kora

Additional
Human
Ships

Ares

Conestoga

DY-100

Intrepid
J
Class

Neptune
NX
Class
NX Test
Ship

Saturn V
SS
Enterprise
The
Phoenix
Type 0
Shuttle
USS
Enterprise

Valiant
Y
Class

Additional
Kazon
Ships

Raider

Predator

Additional
Klingon
Ships

B'rel

D'tai

D-5

D-7
Early Bird
of Prey

K'pak

K'T'Inga
Bird
of Prey
Cargo
Ship

Tanker

Negh'var

Raptor

Regency

Voodieh

Vor'cha

Additional
Romulan
Ships

D'Deridex
Early Bird
of Prey

Narada

Norexan
Bird
of Prey

D7
Science
ship

Scout

Shuttle

Scimitar

Scorpion

Additional
Son'a
Ships

Battleship

Collector

Destroyer

Additional
Suliban
Ships
Cell
Ship
Module
Ship
Salvage
Ship

Additional
Talarian
Ships
Observation
Ship
War
Ship

Additional
Vulcan
Ships

D'Kyr

Sh'Raan

Suurok

Vahklas

Lander

Additional
Xindi
Ships
Insectoid
Assault Ship
Insectoid
Fighter
Insectoid
Warship
Primate
Ship
Primate
Shuttle
Reptilian
Warship

Additional
Miscellaneous
Ships
Kumari
class
Angosian
Ship
Cravic
Ship

Yonada
Hirogen
Ship
Husnock
Ship
Krenim
Patrol
Krenim
Timeship
Krenim
Warship
Malon
Ship
Mawasi
Cruiser
Eymorg
Ship
Nihydron
Ship
Pralor
Ship
Promellian
Battlecruiser

Dauntless
Tarellian
Ship
Doomsday
Machine

V'Ger
Whale
Probe
Varro
Ship
Zahl
Ship

Additional
StandardRefitImages
Size Comp

D-7 Class

Standard

Universe : Prime Timeline
Affiliation : Klingons
Class Name : D-7 Class
Type : Cruiser (Obsolete)
Unit Run :
IKS Groth1 - Retired
plus 348 others built in total. 63 have been lost in all. 286 have been retired from service.
Commissioned : Entry date uncertain, but about 2146. Retired as of 2285
Dimensions : Length : 228 m2
Beam : 160 m3
Height : 60 m3
Decks : 18
Mass : 470,000 metric tons
Crew : 4404
Armament : 4 x Mark 7 disruptor cannon5, total output 750 TeraWatts
2 x Original photon torpedo tube5 with 260 rounds
Defence Systems : Standard shield system, total capacity 54,000 TeraJoules
Heavy Monotanium Double hull plus 3 cm High density armour.
Standard level Structural Integrity Field
Warp Speeds
(TOS scale) :
Normal Cruise : 5
Maximum Cruise : 5.6
Maximum Rated : 6.6 for 10 hours.
Strength Indices :
(Galaxy class = 1,000)
Beam Firepower : 15
Torpedo Firepower : 40
Weapon Range and Accuracy : 25
Shield Strength : 20
Hull Armour : 320
Speed : 150
Combat Manoeuvrability : 5,280
Overall Strength Index : 71
Diplomatic Capability : None
Expected Hull Life : 100
Refit Cycle : Minor : 5 year
Standard : 5 years
Major : 20 years

Notes

The D-7 class battle cruiser was first encountered by Humanity when the first Starship Enterprise met one in 2151.6 The date of service entry is unknown, but by 2151 the Klingons already had significant numbers of these ships in service so a date of no later than 2146 seems to be likely. The D7 was far more powerful and advanced than the NX class Enterprise,6 and was available to the Klingons in far greater numbers as of the early 2150s.

In layout the D-7 set the standard for all Klingon designs up until the present day. The bulk of the ship's colume is in the large engineering hull attached to the two nacelles, with a small secondary hull mounted on the end of a long 'neck' section that projected forwards.7 This concentrated the vessels mass towards the rear, making it easier for the engines to change the vessels attitude in space. The weapons of the original D7 comprised two torpedo tubes, one in the head facing directly forwards and one in the engineering hull facing due aft.7 There may have been other weapons also.

Facilities were also included to support ground troops, though this is not so significant on Klingon vessels as on Human or Federation ones; since virtually all Klingon warriors are well trained and experienced in hand to hand combat, any vessel with a transporter is capable of landing significant ground troops.

A D7 class vessel was used by a group of Klingon fundamentalists to depart for the Delta Quadrant in approximately 2275. Following the dictates of a religious prophecy the ship journied for over a century before encountering the USS Voyager, whereupon it was destroyed by its crew in order to fulfil the prophecy.8

The urgent need for as many ships as possible during the Dominion war led to the reactivation of the small number of remaining D7 ships, and some of these vessels took part in the Allied assault into Cardassian space which eventually ended the war.9
Yellow text = Canon source Green text = Backstage source Cyan text = Novel White text = DITL speculation

References

# Series Season Source Comment
1 DS9 5 Trials and Tribble-ations
2 Calculated from the scale diagram on page 317.
3
4 TOS 3 Day of the Dove
5 Generic canonical information
6 ENT 1 Unexpected
7 Visible on the shooting model
8 VOY 7 Prophecy
9 DS9 7 What You Leave Behind, Part 1
Series : DS9 Season 5 (Disc 2)
Episode : Trials and Tribble-ations
Comment : Calculated from the scale diagram on page 317.
Series : TOS Season 3 (Disc 2)
Episode : Day of the Dove
Source : Generic canonical information
Series : ENT Season 1 (Disc 2)
Episode : Unexpected
Source : Visible on the shooting model
Series : VOY Season 7 (Disc 4)
Episode : Prophecy
Series : DS9 Season 7 (Disc 7)
Episode : What You Leave Behind, Part 1

Comments

The D7 is one of the standard Klingon ships in regular service from 2151 (in Enterprise "Unexpected") right up to the 2270s and beyond (in Voyager "Prophecy"). For details of this and other Klingon battlecruiser variants, see my article on the Klingon Battlecruiser.
Copyright Graham Kennedy Page views : 28,717 Last updated : 20 Sep 2016