I don't know much at all about GPS, but would it be possible to locate the exact
cone locations by imbedding steel pins in the surface, and later locating them
with a metal detector? These could be inserted in a drilled hole, sealed with a
fast-set concrete, and otherwise invisible on the surface. There may be some
conflict with steel reinforcement in the concrete, but that would dictate the
size of the insert. A standard issue GPS could get you close, then locate the
cones with a metal detector.
Just a thought. I've never tried it.
Mark J Bradakis wrote:
> How accurate and repeatable are currently available GPS devices?
>
> Now the new airport manager has
> said we can no longer make permanent markings on the surface. And
> there is also a chance we may have to modify our course to adapt to
> some changes being made. So a new course, no way to mark it and very
> few points of reference [ http://www.team.net/ivr/images/ivr_21.jpg]
> for layout hints. So would it be possible to locate some critical
> apexes and such using a handheld GPS, with the less important cones
> just filled in where it looks about right?
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