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When you connect to the Matrix and have your persona stroll around there, your device's icon is no longer around, only the persona. Or, they are one and the same.
If an icon's location in the Matrix corresponds to its physical location, then how do you actually move somewhere inside the Matrix?
A persona can move, right? I mean, obviously it can.
Your icon doesn't move - that's the point. You can see things that are far away in the matrix without moving to them - it's basically like having a browser window showing you web pages that are on a server on the other side of the word.
You are interacting with the world by having really long arms to reach out (that's where noise is coming in, messing up your ability to interact - the closer you are physically to something, the less noise you have to deal with)
That's why I said, they just should have used the magic system where you separate from your body and move as a spirit through the astral.
Instead of going to the things in the matrix, you are just looking and interacting with them from afar (i.e. from the physical location of your device). That's really un-intuitive - but that's how it's set up.
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There is someone using a device to connect to the Matrix. A persona is formed. The persona moves to a different place in the Matrix. The device, obviously, stays where it is.
Trackback leads you to the vincinity of the persona. If that is the physical location of the device (or its vincinity), then it is not the vincinity of the persona, because that has moved elsewhere.
How is that supposed to work, if it is not purely virtual tracking?
If you accept the long arms analogy, you see that your persona doesn't actually move - you just interact with everything in the matrix from afar. Everything about detecting a location is centered on the physical location of the device. Hosts are the exception because they don't have a physical location - which is why they can be seen and visited from anywhere in the matrix without noise.
If you leave out noise from the equation, basically everything in the matrix is within arms reach - you just need to adjust your filters, so you only see the things relevant for you. Running silent is a way to make it difficult for your filters to keep the silent icon in the relevant set.
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What would you need the Trace Icon action for in your example? Once you are in the physical vincinity and spot the icon, you know where it is located physically, or not?
Isn't the whole point of the Trace Icon action to do that when you are not in the icon's (physical) vincinity?
Yes and no: If you have line of sight to a persona in the real world (i.e. AR enhanced vision showing your Augmented Reality Objects (AROs)) you can correlate the device location with the persona. But as soon as line of sight is broken, you no longer can pinpoint their position.
You either need the Trace action to get their GPS info on a map, or you need to have performed the TAG action to see their icon through walls (see below).
If they are running silent, their persona is only visible after a successful matrix perception test and it is not correlated to their physical location. You basically just see a notification that a silent running icon is within 100 m of you.
That's the reason stealth tags were used early on to hide your silent running persona - because you had to look at each individual icon to identify what it was. (In Kill Code they changed the rules so this trick no longer works, as you can now filter those tags out).
[Spoiler=TAG]
(SIMPLE ACTION)
Marks required: None
Test: Computer + Logic [Data Processing] v. Sleaze + Intuition
You track and analyze enemy movements in real time, giving your allies the edge in engagement.
The hacker may “tag” a number of targets on a single PAN, equal to their net hits, within their line of sight. They can then relay those tags wirelessly to allies. Tagging a target negates up to 2 dice in penalties from Visibility and Light/Glare to any affected ranged attack rolls allies may be making against that target, including blind-fire due to invisibility or shooting through cover. Allies who can see a tag may also take one additional Take Aim Action against that target as a Free Action on each Initiative Pass. Tags may be sustained by spending a Simple Action to refresh the tags each Combat Turn. When using a PI-Tac, the hacker may add the PI-Tac’s level to the number of targets they may tag. Note: In order for allies to receive this bonus, they must have the ability to see AROs.[/spoiler]
And yes, this is confusing as hell - doesn't help that the information is spread out over three books