If there is one thing a good Traveller referee needs above loads of planets to visit, it is a bunch of ships to travel between them. I've always taken the view that there will be a vast range of different types of craft out in the black, and look to reflect this in the ships my players encounter in their travels. (If you are dubious, just take a look at the diversity of cars in the nearest parking lot... and that's before you get into specialist vehicles from tankers to trucks, earth-movers and miliary vehicles!)
Beginning with some evocative fiction - a day in the life of a patrol vessel - complete stats for the Kiviat Class Patrol Corvette are given. These are followed by detailed plans, including the ship's boat which does duty as a boarding craft whenever inspections or other interventions are needed... and a glorious full-colour banner for the Hub - an area whose heritage in both German and British roots are clearly seen. There are also some external views of the ship.
More details follow, about the development of the class and tales of some of the corvettes in Hub service. This also includes a detailed description of the interior, which can be matched to the plans already provided to have a walk-through of what is to be found there. It is full of tidbits, from the life history of one young British officer trapped in the region by the collapse of links back to Earth, the formation of the Hub's armed forces from German and British naval vessels stranded there and notes on typical duties assigned to vessels of this class.
Even if you are not using the Clement Sector in your game, there is scope for incorporating this class of ship into the forces serving a given planet or group of planets. Perhaps characters served aboard, if they were in the Navy, or they may have encountered such ships in their travels. As a fairly specialised naval vessel, it is unlikely to be the party's ship (unless you are running a 'serving navy' game) but it is possible that they could meet one during their adventures - or just see it in port, a little local colour to add variety.