Emergency Beacon Detection Range

Yet a ship can see a star on their sensors from thousands of parsecs away. That doesn't really jibe with the sensor rules either.

Also, jump detection range is unlimited. You can detect a ship entering or exiting jumpspace from a thousand parsecs away as well. So, by the rules, I can detect a 100-ton ship exiting jumpspace on the other side of Charted Space, but a supernova can't be detected at that distance with Traveller rules.
an EYE can see a star on their retina from thousands of parsecs away... (it really can V762 Cas, the furthest star that can be seen with the naked eye, is 4,908 parsecs away!) so not 100% sure what your point is, you seem to be comparing apples with grapes
 
an EYE can see a star on their retina from thousands of parsecs away... (it really can V762 Cas, the furthest star that can be seen with the naked eye, is 4,908 parsecs away!) so not 100% sure what your point is, you seem to be comparing apples with grapes
The point is that a beacon designed to send a distress call can be detected by any ship's sensor within the stellar system, because both the beacon and the sensors would be made to standards that facilitate the detection of a Signal GK.
At least if they are made by the same or cooperating interstellar polities.
 
an EYE can see a star on their retina from thousands of parsecs away... (it really can V762 Cas, the furthest star that can be seen with the naked eye, is 4,908 parsecs away!) so not 100% sure what your point is, you seem to be comparing apples with grapes
The point is that a beacon designed to send a distress call can be detected by any ship's sensor within the stellar system, because both the beacon and the sensors would be made to standards that facilitate the detection of a Signal GK.
At least if they are made by the same or cooperating interstellar polities.
This is My point exactly. The detection range for a signal is effectively unlimited. Same way you can detect a ship exiting jumpspace in the Galactic Core from Regina. You won't detect it until the speed of light can travel that far, but by the rules, you still detect it.

With an emergency beacon it is even easier since the maximum range that others have been discussing for an emergency beacon is system-wide, max of 1 parsec, but usually vastly less than that.
 
With an emergency beacon it is even easier since the maximum range that others have been discussing for an emergency beacon is system-wide, max of 1 parsec, but usually vastly less than that.
A one parsec range radio beacon is a little silly. The chance it is still an emergency 3 years later is nil, either it has been handled or you died. Now you still may be marooned on a habitable planet at that time but it stopped being an emergency and is merely a severe problem.
 
A one parsec range radio beacon is a little silly. The chance it is still an emergency 3 years later is nil, either it has been handled or you died. Now you still may be marooned on a habitable planet at that time but it stopped being an emergency and is merely a severe problem.
The signal doesn't stop. You can't just turn it off after 2 million kilometers. The signal keeps going and will still be detectable. Remember. It is an emergency beacon. You want it to be detected over an area the size of a whole star system and to be detectable by anyone with basic sensors. That means that anyone with better sensors will be able to detect it from outside of the system that it was transmitted from.
 
I personally think the unlimited range of detecting jump flashes is a lapse in Mongoose clearly delineating the detection rules. There need to be upper limits on things like that.
I agree. How many ships do you think jump in just the Deneb sector every day? The sensors at the starport can detect all of them at lightspeed. They will detect the jump flash (as long as it is not a ship with Stealth Jump) from a jump that occurred 100 years ago, 100 light-years away.

So, yeah, it is a rule that should probably be revisited.
 
The signal doesn't stop. You can't just turn it off after 2 million kilometers. The signal keeps going and will still be detectable. Remember. It is an emergency beacon. You want it to be detected over an area the size of a whole star system and to be detectable by anyone with basic sensors. That means that anyone with better sensors will be able to detect it from outside of the system that it was transmitted from.
The cube law says that the beacon will be immensely reduced at interstellar ranges.

Sufficiently good sensors would allow it to be detected at longer ranges but there are still limits. The sensors to detect such faint signals wouldn't be normal for a ship. MAYBE a explorer ship with sensor add ons might do so.
 
A one parsec range radio beacon is a little silly. The chance it is still an emergency 3 years later is nil, either it has been handled or you died. Now you still may be marooned on a habitable planet at that time but it stopped being an emergency and is merely a severe problem.
It sort of defies the definition of emergency, if it is still happening after 3 years.
 
The cube law says that the beacon will be immensely reduced at interstellar ranges.

Sufficiently good sensors would allow it to be detected at longer ranges but there are still limits. The sensors to detect such faint signals wouldn't be normal for a ship. MAYBE an explorer ship with sensor add ons might do so.
This.
 
It sort of defies the definition of emergency, if it is still happening after 3 years.
An emergency low berth in an escape pod with a Sterling Fission power plant will be good for a minimum of twenty years. Just designed one. That means an emergency might last quite a while.
 
The signal doesn't stop. You can't just turn it off after 2 million kilometers. The signal keeps going and will still be detectable. Remember. It is an emergency beacon. You want it to be detected over an area the size of a whole star system and to be detectable by anyone with basic sensors. That means that anyone with better sensors will be able to detect it from outside of the system that it was transmitted from.
Like said above, the signal strength drops with distance using the cube law. As we don’t know the actual strength, it’s hard to guess what that would mean really.
 
Like said above, the signal strength drops with distance using the cube law. As we don’t know the actual strength, it’s hard to guess what that would mean really.
What we do know is that anything less than a system-wide signal and it will be fairly useless for system traffic. We also know that every ship can detect Signal-GKs. Also, An EPIRB has a range of 400 nautical miles, omni-directional, (through an atmosphere UWP Code 6) and is only 5 watts. That is using TL-7 technology. 100% detection rate and gives your exact location to within 100 meters.
 
What we do know is that anything less than a system-wide signal and it will be fairly useless for system traffic. We also know that every ship can detect Signal-GKs. Also, An EPIRB has a range of 400 nautical miles, omni-directional, (through an atmosphere UWP Code 6) and is only 5 watts. That is using TL-7 technology. 100% detection rate and gives your exact location to within 100 meters.
I hear what you’re saying, but I don’t think I’m on board with unlimited in system detection range for even an emergency beacon. It’s too much.
 
I hear what you’re saying, but I don’t think I’m on board with unlimited in system detection range for even an emergency beacon. It’s too much.
Why is it too much? The human eye can detect a 100w light bulb 2,000km away unaided. Does it overpower the game in some way?

The detection range on a 100w broadband transmission in the centimeter-millimeter band for a TL-6 or 7 100-meter radio telescope is roughly 5-10AU. I would assume that it would be much better by TL-12+
 
The Voyager is transmitting from beyond the heliopause (About 17,600 Solar Diameters according to Google).
Up the power, repeat the message on a rotating directional transmitter. Use the emergency frequency and the thousands of years old emergency signal prefix. That signal will be detectable by any space faring sensor within the system. If for no other reason than that the sensor will be programmed to scan for and amplify such signals automatically. Even the basic ones.

Finding, and more relevantly - identifying, a ship that is just puttering along is where the sensor ranges come into play.
 
Why is it too much? The human eye can detect a 100w light bulb 2,000km away unaided. Does it overpower the game in some way?

The detection range on a 100w broadband transmission in the centimeter-millimeter band for a TL-6 or 7 100-meter radio telescope is roughly 5-10AU. I would assume that it would be much better by TL-12+
And there is the key. It needs a big receiver to get that effect.

As to why, I dislike things that are overpowered and simply declaring all Signal GKs detectable at will no matter where they are is unwarranted. Double the distance and the signal strength drops by 3/4. Add in background noise in space and a weaker signal will be lost. It’s too sweeping to just declare you can detect a signal at extreme distances. I don’t buy it.
 
The Voyager is transmitting from beyond the heliopause (About 17,600 Solar Diameters according to Google).
Up the power, repeat the message on a rotating directional transmitter. Use the emergency frequency and the thousands of years old emergency signal prefix. That signal will be detectable by any space faring sensor within the system. If for no other reason than that the sensor will be programmed to scan for and amplify such signals automatically. Even the basic ones.

Finding, and more relevantly - identifying, a ship that is just puttering along is where the sensor ranges come into play.
To a dedicated, massive receiver array that knows precisely where to look.

A transponder gives a plus six to detection. I’m willing to grant an emergency beacon the same effect. Unlimited detection? No.
 
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