[extropy-chat] PRIVACY: GPS darts

Dan Clemmensen dgc at cox.net
Tue Apr 20 21:54:31 UTC 2004

The smallest fish radio tag I have found so far on google is
7.3mm diameter by 18mm length, with a 4cm antenna:
I'll keep looking.

Mike Lorrey wrote:

>I am familliar with tags that are embedded in baby trout, which game
>wardens can use to track fish populations in streams from as much as
>100' from the bank. This tech was available in 1999 and being used here
>in NH. Had not seen the size of the tags, but I was told they were
>injected, with a cross section of 1-2 mm by 20 mm or thereabouts.
>--- Dan Clemmensen <dgc at cox.net> wrote:
>>I knew it was a spoof before I looked at the page, based on the
>>and the power requirement. If I want to use high tech to tag and
>>someone, this is not the way I would do it.
>>On the antenna size: There is a reason an RFID tag is 2cmX5cm.
>>On power: there is a reason an RFID tag can only be scanned from
>>within a few feet at most.

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