![]() If you come across another benchmark reset your altimeter and proceed you wont have to make internal adjustments.īarometric pressures and differ from local to local areas. Follow the map, check your elevation on the altimeter and find the contour line of the ridge, trail, road, creek, canyon, tree line what ever your following. This can be an extremely accurate method of navigation. Set your Thommen to the TOP of the bench mark and adjust to the altitude of the benchmark. On the topo map find the benchmark normally in black ink and note as " + 7360" or " + 2237m" if in meters. Benchmarks are located at many and various locations on the map. You will need to find and be at a bench mark (A concrete monument with a brass disc set in the top with USGS and elevation stamped in the disc). ![]() To be dead nuts on for a particular area you are going to need a 7 1/2 minute USGS topographic map for your area.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |