On 22Aug2020 1424, xxxxxx@gmail.com wrote:

> That's a broad classification. I was thinking more local to a system  > itself ('there's a damaged freighter with a hazardous cargo being >
salvaged in orbit x of planet y and all ships are required to > maintain
at least 1000 km clearance' or 'the primary in this system > is
experiencing significant coronal mass ejections at this time; > System
Guard recommends all vessels within 100 solar diameters review > their
radiation protocols and equipment, have appropriate protective >
measures immediately available, etc') NOTAMS (in an nautical setting) >
would include some bulletins about navigation aids >
(lights/radio/ranges/etc), weather warnings, issues with anchorages > or
harborages, spills, vessels stuck, adrift, derelict, etc, as well > as
any areas closed to civilian traffic. In a Notice To All Spacers >
(NOTAMS), there might be bulletins about navigational aids, system >
emergency channels/stations, space weather events, navigational >
hazards, port issues, spills, stuck/adrift/derelict vehicles, areas >
prohibited to civilians, information about safe orbits around various >
planets and satellites, a pointer to local information services and >
dockage, etc.
I would expect that on arrival you'd receive such notifications from the
system's traffic control, probably from a simple repeating message
relayed by beacons on a standard frequency. Major cautions would be
dumped into the mail systems to be spread to and posted at neighbouring
worlds. But then I'm not super-keen on the SPA model from GURPS
Starports - I consider it too intrusive and it makes the customs checks
on spaceships that haven't yet landed probably a breech of Imperial
territoriality - and those are a common mention in Traveller adventures,
etc. IMTU the Imperial SPA inspects starports to make sure that they're
obeying Imperial law and treaties, and that worlds aren't doing naughty
things like imposing selective import tarrifs, etc. or refusing basic
starport services to ships for no good reason, charging some ships more
than others, and so on. They probably also 'strongly encourage' ports to
properly report shipping hazards, etc. to neighbouring worlds (by
pointing out that poor compliance would mean an unfortunate
re-designation as an amber zone by the IISS and/or TAS).

--
Rupert Boleyn <xxxxxx@gmail.com>