The D4 Class is the Klingon faction’s grade 3 Epic Interceptor, a small kinetic attacker that unlocks at Shipyard level 34. It ramps its own weapon damage the longer an enemy carries a Hull Breach, and it can cloak, so it works as a fast pressure ship and an early way to move unseen. For a grade 3 hull it hits hard, but it stays a mid-game stepping stone rather than an endgame ship.
How to get the D4 Class
The D4 Class needs 150 blueprints and a Shipyard at level 34 to build. Once you can lay it down, the base build cost is 7,500,000 Tritanium, 250,000 Dilithium, 8,250 3★ Common Refined Crystal, and 1,375 3★ Common Refined Gas, with a base build time of 34 days 12 hours. Those are base figures; your research and buildings lower the time and can change the cost.
Where the blueprints come from rotates with in-game events and stores, so check the current offers rather than counting on one fixed source.
D4 Class ability
The ship ability, Relentless Hunting, is always active. As long as the target has a Hull Breach, the D4 adds 1% Weapon Damage every round, and the bonus stacks as the fight goes on. The size of that per-round step grows with ship level, from 1% at level 1 up to 25% at level 45.
In play the D4 rewards longer fights against a target you can keep breached: the damage climbs each round, so anything that inflicts or holds a Hull Breach early switches the ability on sooner and lets it snowball.
D4 Class active abilities
On top of the always-on ability, the D4 carries two player-triggered ones. Ship Cloaking hides the ship until the cloak duration runs out or you enter combat, start mining, or dock at a station, which makes the D4 a cheap way to travel unseen or sit hidden. Direct Hit increases all of the ship’s Penetration stats against players by 300% when you fire it, a burst tool for player-versus-player attacks. Both are enabled through refits (below), and you trigger them on a cooldown that eases as the ship tiers up.
Stats and tiers
Base values from the current game data; research, buffs and officers raise them in play.
| Tier | Warp (speed / range) | Impulse | Cargo (protected) | Shield HP | Hull HP | Health (displayed) |
|---|---|---|---|---|---|---|
| Tier 1 | 3 / 40 | 115 | 16,000 (300) | 67,214 | 84,105 | 75,660 |
| Tier 5 | 3.4 / 56 | 115 | 33,630 (380) | 67,214 | 84,105 | 75,660 |
| Tier 9 | 3.8 / 75 | 115 | 84,000 (600) | 67,214 | 84,105 | 75,660 |
Weapons and firing pattern
Warm-up is the round a weapon first fires; cool-down is how many rounds pass between shots after that. The values below are at max tier 9.
| Weapon | Type | Shots | Warm-up | Cool-down | Damage | Crit chance | Crit damage |
|---|---|---|---|---|---|---|---|
| Weapon 1 | Kinetic | 2 | 1 | 2 | 35,242–42,290 | 15% | 135% |
| Weapon 2 | Kinetic | 2 | 2 | 2 | 35,242–42,290 | 15% | 135% |
Both guns are kinetic cannons, so the D4’s whole offense is kinetic. That lines up with Relentless Hunting, which stacks Weapon Damage on both of them.
Crew slots and officer bonus
The D4 opens officer slots as it levels, reaching a full seven at level 45.
| Ship level | Officer slots |
|---|---|
| 5 | 1 |
| 10 | 2 |
| 20 | 3 |
| 30 | 4 |
| 35 | 5 |
| 40 | 6 |
| 45 | 7 |
The ship also raises your officers’ own stats as it progresses, stepping up a shared ladder. Attack, defense and health all use the same values, so one column covers all three.
| Amount | Bonus |
|---|---|
| 300 | 30% |
| 600 | 60% |
| 975 | 90% |
| 1,350 | 120% |
| 1,800 | 150% |
| 2,400 | 180% |
| 3,300 | 210% |
| 4,500 | 240% |
| 6,000 | 270% |
| 9,000 | 300% |
D4 Class refits
Refits unlock extra behavior on the D4, most of them costing shards to activate.
| Refit | What it does |
|---|---|
| D4 Cloaking | Enables cloaking for the D4. Costs 120 shards. |
| D4 Direct Hit | Unlocks the Direct Hit ability. Needs a level 34 Armory and 120 shards. |
| D4 Class Refit | The ship’s standard refit. Costs 120 shards. |
| Hijacked TOS D4 Class | Unlocks the hijacked refit skin. Costs 60 shards. |
| Ascend Key 2 | Unlocks the potential to upgrade your station to level 51. |
The game also offers a TOS D7 skin for the D4 that adds weapon damage against hostiles, worth activating if you keep the ship around for grinding.
Crew for the D4 Class
The D4 is a kinetic Interceptor whose damage climbs while the enemy holds a Hull Breach, so you want a bridge that either boosts weapon or kinetic damage or reliably inflicts a Hull Breach to switch Relentless Hunting on early. As an Interceptor it counters Explorers in the hull triangle, so it earns its keep pointed at Explorer targets and player Interceptors.
Because the best officers move with the meta, check our Officer Tier List for current picks. Crews shift as new officers arrive, so treat any single lineup as a starting point.
Best crews for D4 Class
Captain: Yuki Sulu
Officer: Alexander Marcus
Officer: Kang
D4 Class PvP crew that’s a good counter for morale based crews. A good crew against most ships.
Focus your below deck crew for attack strength.
Captain: Gorkon
Officer: Kerla
Officer: Khan Noonien Singh
D4 Class PvP crew that’s focuses on getting big criticals in early and fast.
The below deck crew should be balanced.
Captain: Azetbur
Officer: Gorkon
Officer: Khan Noonien Singh
D4 Class PvP crew that decreases piercing mitigation while creating hull breaches.
The below deck crew should be balanced.
The D4 Class in Star Trek
The D4 is one of the lesser-seen Klingon cruiser designs and gets little dedicated screen time in Star Trek, so the game supplies its story. In-universe it is a small, fast fighter used to intercept and destroy enemies, doubling as a troop carrier for infiltration and extraction missions, with squadrons patrolling the surface of Qo’noS as an elite home-defense force. Read it as a Klingon workhorse rather than a hero ship tied to one episode.
D4 Class build cost by tier
Build and repair costs for every tier, carried over from the previous version of this page.
| Tier | Build cost | Repair cost | Build time | Repair time | Cargo | Protected cargo |
|---|---|---|---|---|---|---|
| Tier 1 | 6,636,000,000 Tritanium 89,400,000 Dilithium 1,155 3★ Rare Gas 11,000 3★ Uncommon Crystal 4,200 3★ Rare Crystal 108,250 3★ Interceptor Parts |
— | 34d 12h | 23h 22m 42s | Base: 34,850 | Base: 610 |
| Tier 2 | 105,500,000 Tritanium 713,000 Dilithium 2,125 3★ Common Gas 8,350 3★ Common Crystal 1,440 3★ Interceptor Parts |
40,578 Tritanium 10,303 Dilithium |
7d 7h | 1d 1h 4m | Base: 49,410 | Base: 870 |
| Tier 3 | 211,400,000 Tritanium 1,690,000 Dilithium 2,500 3★ Common Gas 200 3★ Uncommon Gas 8,200 3★ Common Crystal 850 3★ Uncommon Crystal 2,890 3★ Interceptor Parts |
104,962 Tritanium 35,745 Dilithium |
14d 14h | 1d 3h 45m 42s | Base: 65,930 | Base: 1,140 |
| Tier 4 | 353,400,000 Tritanium 3,540,000 Dilithium 13,200 3★ Common Gas 1,300 3★ Uncommon Gas 43,800 3★ Common Crystal 5,500 3★ Uncommon Crystal 10,000 3★ Interceptor Parts |
172,480 Tritanium 46,735 Dilithium |
24d 7h 20m | 1d 6h 34m 18s | Base: 85,000 | Base: 1,420 |
| Tier 5 | 663,600,000 Tritanium 7,150,000 Dilithium 15,000 3★ Common Gas 3,250 3★ Uncommon Gas 16,500 3★ Common Crystal 15,600 3★ Uncommon Crystal 17,250 3★ Interceptor Parts |
269,184 Tritanium 63,257 Dilithium |
36d 11h | 1d 10h 1m 12s | Base: 107,400 | Base: 1,710 |
| Tier 6 | 1,192,000,000 Tritanium 14,300,000 Dilithium 2,000 3★ Uncommon Gas 48 3★ Rare Gas 16,500 3★ Common Crystal 5,250 3★ Uncommon Crystal 200 3★ Rare Crystal 17,475 3★ Interceptor Parts |
457,740 Tritanium 97,106 Dilithium |
48d 14h 40m | 1d 14h 30m 12s | Base: 134,130 | Base: 2,020 |
| Tier 7 | 2,651,000,000 Tritanium 33,500,000 Dilithium 9,200 3★ Uncommon Gas 360 3★ Rare Gas 77,000 3★ Common Crystal 24,500 3★ Uncommon Crystal 1,500 3★ Rare Crystal 77,800 3★ Interceptor Parts |
774,486 Tritanium 157,726 Dilithium |
60d 18h 20m | 1d 19h 53m 12s | Base: 166,480 | Base: 2,360 |
| Tier 8 | 4,640,000,000 Tritanium 60,400,000 Dilithium 6,000 3★ Uncommon Gas 530 3★ Rare Gas 6,500 3★ Uncommon Crystal 2,450 3★ Rare Crystal 71,850 3★ Interceptor Parts |
1,402,474 Tritanium 287,164 Dilithium |
78d 23h 50m | 2d 4m 12s | Base: 206,120 | Base: 2,730 |
| Tier 9 | 6,636,000,000 Tritanium 89,400,000 Dilithium 1,155 3★ Rare Gas 11,000 3★ Uncommon Crystal 4,200 3★ Rare Crystal 108,250 3★ Interceptor Parts |
2,455,110 Tritanium 551,870 Dilithium |
97d 5h 20m | 2d 4h 36m 12s | — | — |
D4 Class ship XP needed by level
Experience required to reach each level, with the health and shield bonuses that come with it.
Tier 1
Level 2: 800
Level 3: 1,000
Level 4: 1,400
Level 5: 1,700
Tier 2
Level 6: 2,400
Level 7: 2,900
Level 8: 3,900
Level 9: 4,600
Level 10: 6,000
Tier 3
Level 11: 7,000
Level 12: 8,500
Level 13: 9,500
Level 14: 11,000
Level 15: 13,500
Tier 4
Level 16: 15,000
Level 17: 17,500
Level 18: 19,500
Level 19: 23,000
Level 20: 25,000
Tier 5
Level 21: 29,000
Level 22: 31,500
Level 23: 36,000
Level 24: 39,000
Level 25: 42,000
Tier 6
Level 26: 47,000
Level 27: 51,000
Level 28: 57,000
Level 29: 61,000
Level 30: 69,000
Tier 7
Level 31: 72,000
Level 32: 81,000
Level 33: 86,000
Level 34: 95,000
Level 35: 100,000
Tier 8
Level 36: 105,000
Level 37: 116,000
Level 38: 122,000
Level 39: 134,000
Level 40: 140,000
Tier 9
Level 41: 154,000
Level 42: 161,000
Level 43: 176,000
Level 44: 183,000
Level 45: 200,000
Resources to max out a D4 Class
Total Build Cost*
- 16,460,400,000 Tritanium
- 210,943,000 Dilithium
- 20,100 3★ Common Gas
- 15,075 3★ Uncommon Gas
- 1,913 3★ Rare Gas
- 109,950 3★ Common Crystal
- 46,400 3★ Uncommon Crystal
- 7,600 3★ Rare Crystal
- 254,430 3★ Interceptor Parts
Experience: 2,561,700
*Costs and time are base values only. These are player-specific based on buildings and research.
D4 Class recycling time & reward
Scrapping rewards at level 45
Scrap Time*: 44d 01h 01m
Seconds: 3,805,260
Rewards*:
- 1,646,415,000 x Tritanium
- 31,653,950 x Dilithium
- 141,133 x 4★ Common Gas
- 7,998 x 4★ Uncommon Gas
- 1,255 x 4★ Rare Gas
- 262,103 x 4★ Common Crystal
- 14,853 x 4★ Uncommon Crystal
- 2,330 x 4★ Rare Crystal
- 442,127 x 4★ Common Interceptor Parts
- 51,234 x Ship Xp
- 33,160 x 4★ Uncommon Interceptor Parts
Note:
* Trit & Dil rewards are based on upgraded components.
* Scrap time will depend on the level of your Scrapyard.
D4 Class video
Unveiling the D4 Class! | Star Trek Fleet Command’s EPIC 3* Klingon Ship | Tiers 1-4 Cost + Comparisons
D4 Class | Crewing your Level 34 Klingon Faction ship in Star Trek Fleet Command | PVP crews
Is the D4 Class worth it?
For its grade 3 band the D4 is a strong kinetic hitter and a cheap way to unlock cloaking early, which makes it handy for scouting and quick player hits. It does not stay competitive into the higher grades, and it becomes scrappable once your Operations reaches level 50, so most players run it as a capable mid-game Interceptor and later feed it to the Scrapyard. Chase it if you want Klingon kinetic pressure or an early cloak.