This is a 2-stage multi-cache. You can park in the same place for the 1st and final stages. I'll include the clue for the final here, as some may wish to do some advance work before venturing to make the find...
Stage 1 is simply an LPC film container with the following: "From this point traverse 285 cubits Due North to the final stage. When making your calculations, round your cubit up to the nearest inch for your sanity."
Enjoy the hunt!
** I took several different measurements so I'm hoping this is pretty spot-on, please let me know if you come up with markedly different results. ** ** Many thanks to Andyw3901 for his help with this one - giving him credit for the FTF because sometime in the 24 hours between posting and his searching the container had gone missing **