This ship was a cruiser and a successor design to the smaller Praetorian-Class Frigate Serving on the line in fleet engagements as a courier and as a Command ship of large fleets, it was a workhorse of the Republic and a common sight near Republic-controlled worlds. This This ship could also undertake independent operations, unlike the Foray-Class Blockade Runner which was never observed outside a supporting fleet. Hammerheads were able to enter atmospheres and land on planetary surfaces.
The spaceframe resembled the later Consular-class cruiser and the CR90 corvette, though this may have been coincidental. They also bore a large resemblance to the EF76 Nebulon-B escort frigate of the Galactic Civil War era, due to the vertically elongated bridge.
In 3956 BBY the cruisers appeared to possess at least seven turbolasers, with three batteries of two and a single turbolaser cannon mounted atop the hammerhead bridge structure all facing forward, as well as an unknown number of quad-lasers pointing aft. As demonstrated by the Endar Spire and the Harbinger some years later, they also appeared to have a number of lighter, point-defense laser cannons for use against small craft mounted at various points along the hull.
They were propelled by four ion engines emitting particles in the orange section of the visible spectrum during the wars around 3956 BBY. This changed over time, earlier ships having three engines that emitted blue particles.