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116 lines
5.0 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
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<title> CUCC Expo Prospecting Handbook: Taking Bearings </title>
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<link rel="stylesheet" type="text/css" href="../css/main2.css" />
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<body>
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<h2 id="tophead">CUCC Expedition Prospecting Handbook</h2>
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<h1>Taking Bearings</h1>
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<p style="font-style: italic">Note: With the vast increase in the use of GPS units I
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think it's a fair while since anyone used bearings for locating new entrances,
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but this document is still relevant as this is the only information we have
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about a number of already explored caves. <span style="text-align:
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right">—DL 2004.04.22</span></p>
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<p>In the long term, every cave that gets a number should be on a
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<a href="survey/ontop.htm">surface survey</a> carried out to the same
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accuracy <b>and with equally good sketching</b> as the underground surveys
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(see the <a href="survey/index.htm">Surveying Guide</a>). Failing that, a
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good <a href="survey/gps.htm">GPS fix</a> should mean that the immediate
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vicinity can be found again. However, for prospecting and initial exploratory
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work, it is usually good enough to take bearings from the entrance and make a
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good sketch or take photographs.</p>
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<p>In theory, any cave can be located by taking bearings to two other known
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points. For this to work at all well, the bearings should be as nearly as
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possible at right angles to each other, and the points should be clearly
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recognisable, well-defined and not too far away. As these criteria are not
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always readily met, it is usually worth taking extra bearings on several
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points (ie. at least three) which can be used for confirmation or for
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spotting duff ones.</p>
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<p>In general, sharp pointy peaks which can be recognised over quite a wide
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area are best, so that the Bräuning Zinken is excellent. Peaks with very
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rounded or multiple summits are generally not useful, so that the Vd.
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Schwarzmooskogel, for example, is particularly bad. In this case, it is
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useful to include a sketch to say exactly which point was used. The apparent
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summit, as seen from Top Camp, is usually called "VSK nipple". This is a good
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50m below the true summit, but appears well-defined. It is fine for finding
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caves in the field but is <b>not</b> adequate for locating them on a map.</p>
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<p>In the cave descriptions, bearings are quoted with a series of standard
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<a href="abbrev.htm">abbreviations for landmarks</a>, which gives a good
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indication of which ones are most useful.</p>
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<p>Ideally, take bearings on one of the points identified in the pictures
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below (follow the links to useful sized images on which the peaks are named).
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Failing that, be sure to identify your feature correctly, using a good map
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(ie. the Alpenvereinkarte 1:25000 sheet 15/1, Totes Gebirge West), and write
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down the name in full, preferably with a sketch.</p>
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<table class="imgtable">
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<tr>
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<td>
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<a href="../piclinks/bw_pks.htm"><img alt="" src="../tinypix/bw_pks.jpg" /></a>
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</td>
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<td><a href="../piclinks/brw-b8.htm"><img alt="" src="../tinypix/brw-b8.jpg"
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/></a></td>
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</tr>
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<tr class="caption">
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<td>A view of the Bräuning Wall (from far out on the plateau) showing
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which peak is which.</td>
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<td>A view showing how the Bräuning Wall becomes foreshortened from
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the "near" plateau and approach to Schwarzmooskogel ridge.</td>
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</tr>
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<tr>
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<td><a href="../piclinks/wildkg.htm"><img alt="" src="../tinypix/wildkg.jpg" /></a></td>
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<td><a href="../piclinks/9603vd.htm"><img alt="" src="../tinypix/9603vd.jpg" /></a>
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</td>
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</tr>
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<tr class="caption">
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<td>A view identifying the peaks visible to the north of the plateau -
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Schönberg, Große and Kleine Wildkogel and Grieskogel.</td>
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<td>A view of peaks seen south from the east side of the Hinterer
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Schwarzmooskogel.</td>
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</tr>
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<tr>
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<td colspan="2">
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<a href="../piclinks/hskvsk.htm"><img alt="" src="../tinypix/hskvsk.jpg"
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width="300" height="140" /></a>
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</td></tr>
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<tr class="caption">
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<td colspan="2">A view south from Hinterer Schwarzmooskogel showing the Trisselberg
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to the left and behind the serried ranks of false summits on the Vorderer
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Schwarzmooskogel. On the far right, Bräuning Nase can be seen.</td>
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</tr></table>
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<p>(More views to follow - however, there's no point until we have actually
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identified the summits on the views with complete certainty :-)</p>
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<hr />
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<ul id="links">
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<li><a href="index.htm">Expedition Handbook</a> - Intro
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<ul>
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<li><a href="look4.htm">Prospecting guide</a></li>
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<li><a href="survey/index.htm">Surveying guide</a></li>
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<li><a href="rescue.htm">Rescue guide</a></li>
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<li><a href="rig/rigit.html">Rigging guide</a></li>
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<li><a href="photo.htm">Photography guide</a></li>
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</ul></li>
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<li><a href="../infodx.htm">Index to info/topics pages</a></li>
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<li><a href="../indxal.htm">Full Index to area 1623</a>
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<ul>
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<li><a href="../areas.htm">Area/subarea descriptions</a></li>
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</ul></li>
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<li><a href="../index.htm">Back to Expedition Intro page</a></li>
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<li><a href="../../index.htm">Back to CUCC Home page</a></li>
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</ul>
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</body>
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</html>
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