The Athena seems to have a specific mission: anti turret and subsystem work. From what I can tell it's about as close as FS comes to a 'Wild Weasel' configuration. The position of the primaries concentrates the main armanent at one small area - great for taking down turrets and subsystems quickly. Though the Avenger is about the best offensive cannon the ship can mount, that same concentrated shot grouping can really pay dividends during a dogfight. It also has a deep afterburner reserve, allowing it to keep smaller craft in the targeting reticule. For the trade-off of two guns it has almost the same protection and manouverability as the Hercules in a faster, lower profile hull.
Anyhow, here's what info is availiable in game.
Table Info:
Name: GTB Athena
Species: Terran
Type: Light Bomber
Maneuverability: Average
Armor: Medium
Manufacturer: Dynamic Metamer
Description: Excellent for hit-and-run bombing. Good speed for its size, with a high capacity afterburner reserve.
Tech Description:
The smallest bomber in the fleet, the Athena has oftentimes been mistaken for a fighter. However, one should not be fooled by its small size. The Athena can carry light bombs, and most missiles. It also has the ability to dogfight well. Its strong shielding and hull make it the favored "Lightning Bomber" of the GTA.
(Corrected stats)
Length: 26 m
Gun Mounts: 2 banks, 2 ports each
Missile Banks: 2 banks, 9 ports each
FS Campaign, mission 10 Briefing exerpt:
* GTD Galatea
* Ikeya System
* 1/31/35
The Taranis
Initial attacks have gone off without a hitch, and the Taranis is on her last leg. Delta and Epsilon wings have destroyed most of the Taranis' fighter escort. It is time to finish the job.
To this end, Terran Command has sent a full wing of Athena bombers, equipped with the newly developed Stiletto bomb.
New Technology: Athena Bomber
The Athena is our most maneuverable bomber. It carries a massive payload, yet, in dogfights, is nearly as effective as a fighter.
Doesn't really mention anything about the age of the Athena, but this exerpt from the FS reference bible implies it's fairly old:
Dubbed the "lightning bomber" by some of its pilots, this little wonder was the mainstay of the GTA fleet before it started developing its bigger warheads. While it doesn't have nearly as much capacity for bombs or the hull strength of its younger brothers, it is still in use today for quick hit and run strikes. Its relatively small frame is carried well by its fast engines, allowing it to achieve speeds even greater than the Terran
Heavy Assault Fighter. While this bomber it pretty useless against the bigger ships, it definitely hasn't outlived its usefulness against transports and freighters. Its massive afterburner fuel reserve is its biggest advantage, its lack of good primary and anti-fighter secondary weapons, its biggest weakness. This bomber is also suitable for disabling a craft.
Best that can be said is it probably predates the Stiletto, and pretty much any other GTA Bomber. Dunno about the Apollo or the Valkyrie, but pretty good bet it's older than the Hercules or Medusa.