
When the XT was unveiled people could not believe it could operate in atmospheres. Previous Dinomarks had had aerodynamic and lifting surfaces. The XT actually has a very low drag due to plasma projection ahead of it and automatic micro-adjustments make the XT a very agile and stable performer in atmospheres. Older models used to be capable of Mach 6 though the current models are restricted to Mach 3 as it is preferable to travel outside of orbit now instead of blasting though the atmosphere annoying sheepdinos with massive sonic booms. Some models of XT have also had aquatic capabilities and can operate as submarines though the extra equipment required means it is restricted to specialist units.
One special XT is the flagship Dinomark, this was the very first production XT produced and has been continuously updated and rebuilt over the decades, usually including the latest technology that is later adopted by the next XT production model. Although over 50 years old Dinomark is one of the most modern warships in the fleet (so much has been replaced Dino engineers do not think any of the original Dinomark now exists!) Recently it has returned from extensive rebuilding after a crash and is capable of 700c and shares a lot of technology from the PT including the advanced combat capabilities. Dinomark can track over 100 targets simultaneously and uses AI to choose the best target to attack with it's multi-phasic missiles (it can fire 2 per second) and energy weapons to achieve best result.
The next production XT model (probably the XT/121) will share this specification. In the late 2080s the Dinos developed the sleek NG class which many thought spelt the end of the XT (and indeed production was scaled back) but the NG proved a disappointment and production ended early and the XT has continued to be churned out. The arrival of the advanced PT class has also not spelt the end of the XT as it is cheaper to produce and is well proven technology. The XT is also ideal for many secondary roles the Army has to perform (though isn't too shabby in combat) due to it's shape and configuration. The Dinos are maintaining a fleet of around 170 though have around 200 in reserve and private ownership (which are kept available for military use in emergencies). Production is around 20 per year and as new ships enter the fleet older ones are withdrawn to the reserve fleet or sold, these ships are still fairly competitive and form a very viable asset.