howard at brazee.net
Tue Feb 28 01:49:52 GMT 2012
On Feb 27, 2012, at 1:06 PM, Adam Ek wrote:
> With regular interstellar commerce I wonder if most ships are required
> to have transponders (locator beacons) like most modern aircraft have?
Transponders are useful when their communications are virtually instant - as on a planet. If the vehicle is approaching us at a significant percentage of C, they might not be so useful.
> Military craft of course probably have the ability to turn them off
> (run silent).
So defenses need to be set up to find them. But speed of light communications might still give people limited time to prepare.
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