Even with precise coordinates and a WAAS enabled GPSr you will not get closer than about 10m accuracy. Just try standing in one spot with the GPSr and watch it wander around over a short period of time to see what I mean. Waypoint averaging might help but you still have to get down underwater for the class a find by the sound of it. That's what makes the last 30m of geocaching hunts so much fun!! It's a lot better than the pre 2002 situation when there were deliberate inaccuracies introduced to the GPS system "for security reasons".

It's a lot better to get a HUGE pump and suck all the water out of the pond - or maybe take scuba diving lessons :) :) Do you have any friends at the local fire department?

Maybe waiting for dry weather and a clear day so you can get a look through the water will have to suffice.

Good luck with the continued hunt

From: BoundaryPoint@yahoogroups.com [mailto:BoundaryPoint@yahoogroups.com] On Behalf Of aletheia kallos
Sent: Friday, October 21, 2005 1:14 PM
To: boundaryPoint@yahoogroups.com
Subject: [BoundaryPoint] hapiri geocoords but why

owing to a crush of other events this morning i scarcely resumed the hapiri try again before noon when i finally succeeded in extracting from the usgs topo the following utm zone 18 geocoordinate data by careful measurement & eyeballing & computation easting 636632m northing 4697380m but this is probably only to about the nearest couple of meters of truth as i understand it add to that the 3 foot range russ claims for his gps receiver & we have already reopened practically the same 10 foot window of his recollection so i have to wonder if he had in mind any better source of data than the usgs topo or if anyone reading this knows of any better data source whether generally or specifically for hapiri i can tell you the national geographics electronic pinpointing process that the map salesman performed for me yesterday was around 33 meters off on the easting & 215 off on the northing tho i dont know if that was complicated by any human error likely the first number wasnt & the second was tho they both made me glad i bought the paper map but anyway whether anyone can help with this or not it is already good reason to call russ the owner back first to deliver these data & ask what better data i could get for him & possibly also to wonder if there even is much point in using the gps for this if we have him himself tho i think i would prefer to get closer to his gps anyway also & certainly to invite his continued involvement & company & blessings & i think i will suggest we try again during the next dry spell meaning probably late summer again but mainly i will be calling him just to get or keep it cooking __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com