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Errata - that difficult subject

Referees Manual
Page 99, Table 4 Beams (correction): The Beam Table should include Energy Weapons and the table does not indicate this. In the title replace the word "Beams" with "Beams: includes Lasers and Energy Weapons"
 
I think I found some Errata in the Referee's Companion.

Page 23 in the Travel Formula Box (correction): replace "(in thousands of kilometers)" with "(in millions of kilometers)"; replace
"the travel time given is in hours." with "the travel time given is in days."

The result of the (corrected) travel formula then corresponds to the figures found in the charts on page 21.
 
Looks like it's been a while since someone's posted here. I'm not sure if this is errata or me not understanding. Per MT PH Starship Weapons table, "A particle accelerator's penetration equals its UCP (Universal Craft Profile) factor x 250 in a vacuum atmosphere ..." That gives a UCP 1 PA a penetration of 250. What exactly is a penetration of 250? Armor table tops out at 120. With an attenuation of 6, the particle accelerator reaches 50,000 km with a single barbette weapon that can slice through battleship armor like a hot knife through butter - and yet in the Referee's Manual it's just an ordinary weapon that gets no DM to its damage roll. What am I missing?
 
What am I missing?
Nothing? Spacecraft weapons are doomsday devices in vehicle combat. If a PA/meson hits you are dead, no matter the details...
Unless the target is a heavy grav tank, a laser will do just the same.

On the other hand direct fire at 50 000 km isn't trivial, with a base difficulty of Impossible beyond 500 km at TL-15.
Anything beyond a few km at personal scale is effectively indirect fire. With a danger space of 15 m you are unlikely to hit a moving target, because of the delay in the fire order.
 
On the other hand direct fire at 50 000 km isn't trivial, with a base difficulty of Impossible beyond 500 km at TL-15.

I guess Ortillery will use indirect fire rules, not direct fire ones...

Why else would Marine CharGen have Forward Observer skill both in Shipboard and Ship's Troops tables?
 
I guess Ortillery will use indirect fire rules, not direct fire ones...
Kinetic (payload) Ortillery is "indirect fire" ... because of de-orbit time.
Laser (directed energy) Ortillery is "direct fire" ... because speed of light over "short" (low orbit) distances.

Most of the Directed Energy Weapons (DEW) are going to wind up falling into the "direct fire" category.
Meson Guns are an exception in that they ALL of their attacks are technically "indirect fire" (so to speak). That's how meson guns achieve their "internal explosion" results, by "indirectly firing INTO things" rather than being intercepted by surfaces (or terrain, etc.) so as to do damage on contact intercept(s).
 
Laser (directed energy) Ortillery is "direct fire" ... because speed of light over "short" (low orbit) distances.

But most of them are, when used as Ortillery, directed by forward observers, not by their own sensors...
 
Spacecraft weapons are capable of being both, direct fire at shorter ranges, and indirect fire at longer ranges:
Skärmavbild 2024-07-19 kl. 15.47.png
You still need a direct line of sight for anything but a meson gun, MT PM, p92.

Direct fire is normally not possible at over 5 km at the personal scale, and definitely not over 5000 km in MT, see PM, p72-74. Hitting a moving target at 500 km is not trivial.
 
Lasers can only be direct fire cuz, you know, Lasers.

But things like Mesons are typically indirect fire (they CAN be direct fire, but that's not the norm), even though they are lightspeed weapons. I don't know if the rules have special consideration for Mesons, since they're not subject to drift and all of the other issues with ballistic weapons.

Also, it should be noted, that Traveller has not concept of the GPS, so putting fire at 123N, 27W is not a real concept in the game. So, there's the whole "the FO is lousy at guessing ranges and positions" that can cause targets to be missed. The whole idea of "walking in meson fire" seems a bit foreign, but that concept it probably baked into the rules somehow.
 
Well, my military experience out of the boardgames is null, but I'll call "indirect fire" any fire who needsto be directed by a Forward Observer, even if it's as straight line as a laser (or any beam, for what's worth).

And as AnotherDilbert points, the rules seem to agree with my nomenclature...
 
I only mention lasers because they're an LOS weapon, and indirect fire is for weapons that the gunner does not have eyes on.

And, lasers do really badly in atmosphere, so they're really not useful for ortillery, PAs are worse.

On a vacuum world, its much different of course.
 
How can a spacecraft weapon that can hit a 10m 100km/sec target evading at 6g at ranges measured in tens of thousnads of km struggle to hit a vehicle sized target moving at most 1km/s at a range of a couple of hundred km?
 
The problem is hitting it with power.
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