GTCv Diomedes

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The following information has not been confirmed by Volition
and is therefore not canon for the FreeSpace universe.

For the model used in older releases of Blue Planet, see GTMf Sparta.
For the canonical Deimos-class corvette that appeared in The Sicilian Defense, see the FreeSpace 2 Terran Ship Database
GTCv Diomedes


Blue Planet: War in Heaven Tech Description

Conceptualized early in the Threat Exigency Initiative warship program, the Diomedes-class strike corvette was shaped by the necessities of two worlds: the tactical realities of the post-Capella battlefield and the political turmoil of a Fleet in crisis.

GTVA designers conceived the Chimera and Bellerophon-class corvettes hand in hand with new doctrines of massive force application. These designs were intentionally overspecialized to neutralize Shivan destroyers and juggernauts with beam alpha strikes. Strike craft support, aggressive subspace maneuvering, and sheer shock would, it was argued, allow the Chimera and Bellerophon to outrun their own design weaknesses.

But more conservative factions of the GTVA military agitated for a less specialized next-generation design, a successor to and improvement upon the still-young Deimos corvette. Politically, they needed a warship that would fit the operational profile of line as well as elite units, but they also offered compelling tactical reasoning. Agile, aggressive combatants lacked the staying power for prolonged defensive operations at hardpoints, nodes, or convoys. A cheaper, more all-round design could supplement Deimos production with a powerful corvette leader or a supporting element to cover the flanks of destroyers or sister corvettes. Other camps in the Fleet added their own requirements: the addition of a fighterbay would open up possibilities as an SOC platform, or in the independent strike role through organic escorts or bombers. Missile launchers and magazines would allow for selectable munition loads.

The notional Diomedes became a rallying point for design schools who had been pushed out of the main thrust of Threat Exigency Initiative work. The design went forward, but these competing requirements should have produced a catastrophic compromise.

Instead, GTVA designers produced a fascinating warship, one whose weaknesses are addressed by carefully counterpointed strengths. Armed with four Bull Frost next-generation anti-warship beams in a pair of twinned lateral batteries, the Diomedes relies on its startling agility to bring its firepower to bear. Designed to engage targets abeam, the class rewards flanking tactics and circling engagements against larger hostiles and aggressive action against multiple lighter opponents. Considerable sacrifices were made to operationalize the ship's fighterbay, but the potency of an on-board interceptor or bomber unit justified the cost, particularly in the areas of point defense and counter-air.

Even as the GTVA has cracked down on its own patronage system, dissolving the lines of influence that connected warship designers and commanders to particular schools, the Diomedes has acquired a reputation for scrappy flexibility and solitary pluck. Neglected by formal doctrine on the eve of the UEF-GTVA conflict except as a general 'flank escort' and 'fast response expedient', Diomedes captains drilled their own tactics and built a quiet professional community.

The ongoing conflict has found the Diomedes thrown into the fire, often alone, often undersupported, acting on sketchy intelligence to provide decisive force at key moments. Casualties among the Diomedes class exceed that of any other next-generation warship, but GTVA commanders have taken note of the design's successes, and of the discipline and capability of her crews. Once seen as the ugly duckling of the TEI warship line, the Diomedes now finds itself in strategic and tactical demand.

Developer Notes


Name Origin

In Greek mythology, Diomedes (Διομήδης) was a hero of the Trojan War. The nephew of Herakles and considered the second-best warrior amongst the Achaeans (behind Ajax), Diomedes eventually became king of Argos.


  • Model and textures by Aesaar



Name GTCv Diomedes
Yaw, Pitch, Roll 48 - 52 - 42 s
Max Velocity 25 (35) ms-1
Hitpoints 95000 pts
Length 1050.98 m
Width 417.39 m
Height 206.52 m
Turrets 22 turrets
Fighterbays 1


Default Statistics
Turret Type Amount
SterPulse 5
AAAf 5
TerSlashBlue 4
Terran Turret 2 6
Piranha 2


Modding Resources

$POF File: GTCv_Diomedes.pof
Texture list: nameplate;diomedes_main;TEI_Turrets;diomedes_lod3;diomedes-debris

Veteran Comments

Please read the Veteran Comments policy before editing this section.

The Diomedes' primary armament, consisting of four TerSlashBlues, is placed on the port and starboard bow of the vessel. This makes the corvette good at attacking to the flanks, but it has trouble engaging targets directly forward or aft.

As with the older Deimos vessels, being around a Diomedes engagement is dicey business, not only do you need to worry about anti-fighter defenses, but the slash beams tend to slash right through fighters. The point defenses of the Diomedes are quite significant, with Aesaars model including five AAA beams - but it's still not as well defended as a Chimera. That said, flying close to these things is typically a bad move. They are also significantly harder to de-fang than the Chimera or Bellerophon.

This ship has great potential, but suffers from a major, glaring flaw: a huge sparsity of turrets on large sections of the ship. The wings/fins, in particular, feature a single AAA beam that shares most of its coverage with another AAA beam on the sloped sides of the radar tower. Given that the Diomedes has a major advantage in point-defenses over other corvettes (in the form of a dedicated fighter bay), this flaw is also rather unnecessary. The Diomedes is also completely lacking in forward armament, and its rear-facing armament isn't all that great, either. Where the Deimos corvette achieves much of its success from having turrets all over its surfaces and excellent field of fire, the Diomedes is jarringly barren in the turret department. Approach from the rear and you'll avoid most of the point-defenses; as a capship, approaching from forward, behind, and directly below will also put you out of range of the slash beams, as well, though the ship's incredibly maneuverability means that it can easily bring those beams to bear if it wants to.

It's basically a pocket destroyer and is usually deployed on its own as an independent strike corvette. It actually can fire its four TerSlashBlues on a single target if it is directly on top of it, because of the angle of the dishes. This gives it 25% more DPS than a Chimera, and on par with the Bellerophon, when only taking beams into account (1698 DPS for the Chimera, 2152 for the Dio, 2232 for the Bellerophon). With the thick point defenses and the fighterbay, you basically have the scariest corvette-sized warship of the BP universe right here. So, it is no wonder they are often deployed alone. Some say this ship is equivalent to the UEFg Karuna, but in most circumstances it is superior by a significant margin.

About its comparison with the Chimera in the post above, it's very important to note that it's very difficult to get a target within the narrow angle above the Diomedes in order to use all four of its beams on the same target. Even then, because of the angle involved, the accuracy won't be as good as it normally is, either. Factor in how slash beams rarely do full damage (although the TerSlashBlue is much better than others in that regard), and the damage output of this ship on a single target can become much smaller than a Chimera under some circumstances. The Diomedes is also noticeably larger than a Chimera, although that is easily explained by the presence of the fighterbay to begin with.

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