GS-31 is a Grade 4 Epic Interceptor in Star Trek Fleet Command, a Section 31 conversion of an unremarkable garbage scow into a covert strike ship. It is a specialist rather than an all-rounder: both of its ship abilities target Apex Raiders in Solo Wave Defense, so it earns its slot in that event and sits idle everywhere else. You can build it once your Shipyard reaches level 45.
How to get the GS-31
The GS-31 needs 200 blueprints and a Shipyard at level 45 before you can start construction. The build cost is 97,506,500,000 Tritanium, 33,800,000 Dilithium, and 76,000 4★ Common Refined Crystal, and the build timer runs 124 days and 12 hours. The game data lists the requirement and cost but not where the blueprints come from, so plan around whatever event or store is offering them when you read this. The 124-day timer is normal for a Grade 4 hull, and speedups or build-time research will shorten it. Start collecting blueprints early, because gathering all 200 usually takes longer than the build itself.
GS-31 ability
The GS-31 carries two always-active ship abilities, and both are written for one job. Apex Shred raises the ship’s Apex Shred effect against Apex Raiders (Solo Wave Defense) hostiles, scaling from 25% at level 1 to 1,000% at level 75. Marked for Disposal raises the ship’s base damage against those same Apex Raiders, from 115,000% at level 1 to 1,100,000% at level 75. Both are live the moment the ship is on the field, with no button to press.
Read together, these two abilities make the GS-31 a purpose-built Apex Raiders ship. Against any other target the bonuses do nothing, which is why it belongs in Solo Wave Defense and not in your general combat rotation. The ship’s in-game story also gives it a charged gravitational blast from its reinforced tractor beam, the signature move that inspired the design.
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 | 5 / 150 | 120 | 650,000 (39,000) | 330,170 | 306,522 | 318,346 |
| Tier 8 | 7.75 / 210 | 120 | 2,350,000 (155,000) | 2,660,188 | 2,469,652 | 2,564,920 |
| Tier 15 | 9.5 / 1,000 | 120 | 8,500,000 (760,000) | 21,765,675 | 20,206,711 | 20,986,193 |
Weapons and firing pattern
Warm-up is the round a weapon first fires; cool-down is how many rounds pass between shots after that. These are the max-tier (15) values. The two energy weapons are the ship’s high-precision phasers; the two kinetic weapons hit almost twice as hard but fire a round slower.
| Weapon | Type | Shots | Warm-up | Cool-down | Damage | Crit chance | Crit damage |
|---|---|---|---|---|---|---|---|
| Weapon 1 | Energy | 2 | 1 | 1 | 1,142,963–1,314,768 | 10% | 150% |
| Weapon 2 | Energy | 2 | 1 | 1 | 1,142,963–1,314,768 | 10% | 150% |
| Weapon 3 | Kinetic | 2 | 1 | 2 | 2,302,255–2,681,355 | 10% | 150% |
| Weapon 4 | Kinetic | 2 | 1 | 2 | 2,302,255–2,681,355 | 10% | 150% |
Crew slots and officer bonus
The GS-31 opens officer seats as it levels up.
| Ship level | Officer slots |
|---|---|
| 5 | 1 |
| 10 | 2 |
| 20 | 3 |
| 30 | 4 |
| 40 | 5 |
| 45 | 6 |
| 55 | 7 |
The ship also boosts the stats of the officers you seat on it, stepping up a ladder as you invest. On the GS-31 the attack, defense, and health bonuses are identical at every step, so one column covers all three.
| Amount | Bonus |
|---|---|
| 1,500 | 50% |
| 3,000 | 100% |
| 4,875 | 150% |
| 6,750 | 200% |
| 9,000 | 250% |
| 12,000 | 300% |
| 16,500 | 350% |
| 22,500 | 400% |
| 30,000 | 450% |
| 45,000 | 500% |
GS-31 refits
The GS-31 has one refit in the data, unlocked with ship shards.
| Refit | What it does |
|---|---|
| GS-31 Simulacrum | Costs 120 shards to unlock. Adds 500 Critical Mitigation against players and 40,000 Critical Mitigation against Academy Training Drones at the start of combat. Critical Mitigation reduces the critical damage you take after all other bonuses; every 500 points lets you absorb 1% more critical damage. |
Crew for the GS-31
Because the GS-31 exists to fight Apex Raiders, build its bridge around raw damage and critical output against those hostiles rather than survivability. An Interceptor like this one wants a captain who lifts weapon damage or critical hits, backed by two officers that reinforce the same line. Let the ship’s own passives do the heavy lifting and use the crew to push damage higher.
Specific picks change with the meta and with which officers you have leveled, so check the Officer Tier List for current recommendations. Any single lineup is a starting point, not a fixed answer.
The GS-31 in Star Trek
The GS-31 is a game-original design with no screen appearance in any Star Trek series or film. Its story is told entirely through Star Trek Fleet Command. After Alpha Team’s mission to stop the Godsend from reaching the Terran Empire, Section 31 took an interest in turning ordinary vessels into covert units. Its engineers took a plain garbage scow, the sort of ship nobody looks at twice, and rebuilt it around an enhanced tractor beam that fires a charged gravitational blast, reinforced hull plating, and high-precision phasers. The result is a ship meant to hide in plain sight and hit far above its appearance.
Is the GS-31 worth it?
For a Grade 4 Epic, the GS-31 is a focused pickup rather than a general workhorse. If you run Apex Raiders in Solo Wave Defense, its two passives push your damage into a higher bracket and make the content far faster. If you do not play that mode, it offers little a standard Grade 4 combat ship cannot. Chase it if Apex Raiders are part of your routine; skip it if they are not.