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The Bend Hiking Group Message Board › How to find your way back with the right map and compass and an optional sim

How to find your way back with the right map and compass and an optional simple GPS

Robert S.
RobertSpeik
Bend, OR
Post #: 76
I propose to offer a FREE hands-on one-hour class on the subject for up to ten interested people, at Larkspur Park behind the Bend Senior Center near the NEC of Reed Market Road and 15th Street, at 6 pm on Thursday, July 9, 2012.

We will show-and-tell about USGS Quad maps ($7) and affordable TOPO map computer programs ($99), that help you print your own small maps. Free Forest Service maps at Trail Heads have UTM Grid lines and give you important locations in UTM NAD27 coordinates. How do you use these maps and grids? If you do not have the right map, you will be unable to use it well with your compass or GPS!

We will talk about how to use a simple base plate Compass, not to just point to North, but to plot a bearing back to car or camp using the right compass on the map as a simple protractor. If you do not adjust CORRECTLY FOR OUR 16 DEGREE EAST DECLINATION, you will be off point 92 feet for each degree off in each mile you walk with your compass! Yes, that could be off from 1,472 to 2944 feet in each 5,280 foot mile

A simple Garmin eTrex H GPS ($99) is just as accurate as a GPS costing $750. There are just five basic pages needed to find your way, to find a location on the map and to plot the way back along trails, traces and contours. Those participants who have a GPS will learn how to use these pages. If your selected GPS Datum does not match your map, waypoints may be off as much as 600 feet!

Handouts can include a printed summary. Then, with a workbook, we will work in pairs and threes on drills and real life situations. I can provide the right maps; you can try your own compass and GPS or try ours.

Are you interested? Let us know and Aaron can post the event.
--Robert Speik
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