As a beta reader for the VH, I saw a couple of things that didn't make the cut but still should be incorporated into High Guard. Here are a couple of things.
Communications Facilities
A communications facility is just a transceiver in a structure. It could be mobile or afloat, but it is a matter of adding options to a special-built structure or vehicle. Transceiver strength is its normal range for high bandwidth communications, but except for meson communicators, the signal can travel further than its listed range.
A dedicated transmission facility, often referred to as a ‘ground station’, though it need not be fixed on the ground, is a large antenna or laser system that can transmit or receive messages across interplanetary or technically interstellar distances and can maintain two-way communications with any receiver capable of orbital range (500 km) with a satellite uplink.
These long range transceivers do not decrease in Spaces or Cost as Tech Levels improve but are still subject to prototype and early prototype effects if built at earlier Tech Levels. Ranges are listed in millions of kilometres (M Km) and astronomical units (AU) with 150 Mkm equal to one (AU). A parsec is approximately 200,000 AU.
Long range communications are definitely needed for starports. There should be longer ranged sensors on such large structures as well.
This could potentially go into the Central Supply Catalogue, but I see few Travellers that would buy one.
Vehicle Construction Times
A Referee or vehicle creator can spend considerable effort developing the time requirements for constructing a vehicle, but that is often a distraction. Instead, a simple rule of thumb can determine the time to construct a vehicle, without constraints to materials, manufacturing equipment, or labour. Without these constraints, a basic rule for construction in a mass production setting is based on the Cost of the vehicle and factors of ten:
Construction Bay
For very expensive vehicles and smaller production runs, a construction bay is a cheaper alternative. The construction bay consumes twice as many Spaces as the completed vehicle. A construction bay in a structure costs Cr50000 per Space of the vehicle it will construct, or Cr25000 per Space the bay occupies. Build durations are 100% longer in a construction bay than in a production line.
A shipyard building a starship with a jump drive costs 50% more per Space.
In my opinion, a shipyard is a construction bay by that inclusion in the above, so the ship construction times are doubled, and we could now calculate how long a ship build takes. The same could be done for a ship built in chunks by different yards, but the assembly time needs to be stipulated.
Mineral Refinery
While this section was cut from the VH, I believe the TL16 Mineral Refinery (superior) is deserving of being added to the High Guard Update.