What can I do with this - Garmin Handheld GPS circa 2000

[xrunner]

Cleaning out a drawer I found this - an old Garmin GPS I got to do geocaching. It's old school black and white and serial RS-232 port. I don't have any need for it now. Runs on 3V, last time I had it on it found the satellites. What can I do with it? Can I get some kind of frequency standard out of it? Any ideas? I'll take it apart but I haven't found out how yet.  Might have to be a destructive tear-down.

[Lightages]

The standard NMEA output over RS232 will not be accurate enough for any kind of time reference. Maybe inside you can find something that is stable but I doubt it.

[linux-works]

it will be within half a second.  for clocks that 'set themselves' that's good enough.

maybe you can find a PPS signal on a chip or trace somewhere, inside? 

the gps modules I buy from ebay are $15 and have serial nmea as well as pps (via a led).  gps is cheap, these days, even with pps output.

[Rick Law]

Another vote as clock - I've been using my old TomTom as the time standard for the house.

The serial data doesn't give me fractional seconds, but good enough that I know I am +-1 second from real time out there.

[wkb]

Why wreck it? If it still works sell it, give it away to someone who can use it. E.g. my Legend became a backup-GPS aboard a sailing vessel.

Wrt use as a clock: these units do not have particularly sensitive rx so your clock better be close to a window.

  Don't understand all these people wrecking functional stuff.  As if we do not have enough e-thrash

[aargee]

I gave my old Magellan hand held to a local fisherman at Vanuatu.
He religiously takes the batteries out when not used and it helps to find home if things go pear shaped.