mirror of
https://expo.survex.com/repositories/expoweb/.git/
synced 2024-12-24 09:22:21 +00:00
116 lines
5.0 KiB
HTML
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">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
|
|
<title> CUCC Expo Prospecting Handbook: Taking Bearings </title>
|
|
<link rel="stylesheet" type="text/css" href="../css/main2.css" />
|
|
</head>
|
|
<body>
|
|
<h2 id="tophead">CUCC Expedition Prospecting Handbook</h2>
|
|
<h1>Taking Bearings</h1>
|
|
|
|
<p style="font-style: italic">Note: With the vast increase in the use of GPS units I
|
|
think it's a fair while since anyone used bearings for locating new entrances,
|
|
but this document is still relevant as this is the only information we have
|
|
about a number of already explored caves. <span style="text-align:
|
|
right">—DL 2004.04.22</span></p>
|
|
|
|
<p>In the long term, every cave that gets a number should be on a
|
|
<a href="survey/ontop.htm">surface survey</a> carried out to the same
|
|
accuracy <b>and with equally good sketching</b> as the underground surveys
|
|
(see the <a href="survey/index.htm">Surveying Guide</a>). Failing that, a
|
|
good <a href="survey/gps.htm">GPS fix</a> should mean that the immediate
|
|
vicinity can be found again. However, for prospecting and initial exploratory
|
|
work, it is usually good enough to take bearings from the entrance and make a
|
|
good sketch or take photographs.</p>
|
|
|
|
<p>In theory, any cave can be located by taking bearings to two other known
|
|
points. For this to work at all well, the bearings should be as nearly as
|
|
possible at right angles to each other, and the points should be clearly
|
|
recognisable, well-defined and not too far away. As these criteria are not
|
|
always readily met, it is usually worth taking extra bearings on several
|
|
points (ie. at least three) which can be used for confirmation or for
|
|
spotting duff ones.</p>
|
|
|
|
<p>In general, sharp pointy peaks which can be recognised over quite a wide
|
|
area are best, so that the Bräuning Zinken is excellent. Peaks with very
|
|
rounded or multiple summits are generally not useful, so that the Vd.
|
|
Schwarzmooskogel, for example, is particularly bad. In this case, it is
|
|
useful to include a sketch to say exactly which point was used. The apparent
|
|
summit, as seen from Top Camp, is usually called "VSK nipple". This is a good
|
|
50m below the true summit, but appears well-defined. It is fine for finding
|
|
caves in the field but is <b>not</b> adequate for locating them on a map.</p>
|
|
|
|
<p>In the cave descriptions, bearings are quoted with a series of standard
|
|
<a href="abbrev.htm">abbreviations for landmarks</a>, which gives a good
|
|
indication of which ones are most useful.</p>
|
|
|
|
<p>Ideally, take bearings on one of the points identified in the pictures
|
|
below (follow the links to useful sized images on which the peaks are named).
|
|
Failing that, be sure to identify your feature correctly, using a good map
|
|
(ie. the Alpenvereinkarte 1:25000 sheet 15/1, Totes Gebirge West), and write
|
|
down the name in full, preferably with a sketch.</p>
|
|
|
|
<table class="imgtable">
|
|
<tr>
|
|
<td>
|
|
<a href="../piclinks/bw_pks.htm"><img alt="" src="../tinypix/bw_pks.jpg" /></a>
|
|
</td>
|
|
<td><a href="../piclinks/brw-b8.htm"><img alt="" src="../tinypix/brw-b8.jpg"
|
|
/></a></td>
|
|
</tr>
|
|
<tr class="caption">
|
|
<td>A view of the Bräuning Wall (from far out on the plateau) showing
|
|
which peak is which.</td>
|
|
<td>A view showing how the Bräuning Wall becomes foreshortened from
|
|
the "near" plateau and approach to Schwarzmooskogel ridge.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="../piclinks/wildkg.htm"><img alt="" src="../tinypix/wildkg.jpg" /></a></td>
|
|
<td><a href="../piclinks/9603vd.htm"><img alt="" src="../tinypix/9603vd.jpg" /></a>
|
|
</td>
|
|
</tr>
|
|
<tr class="caption">
|
|
<td>A view identifying the peaks visible to the north of the plateau -
|
|
Schönberg, Große and Kleine Wildkogel and Grieskogel.</td>
|
|
<td>A view of peaks seen south from the east side of the Hinterer
|
|
Schwarzmooskogel.</td>
|
|
</tr>
|
|
<tr>
|
|
<td colspan="2">
|
|
<a href="../piclinks/hskvsk.htm"><img alt="" src="../tinypix/hskvsk.jpg"
|
|
width="300" height="140" /></a>
|
|
</td></tr>
|
|
<tr class="caption">
|
|
<td colspan="2">A view south from Hinterer Schwarzmooskogel showing the Trisselberg
|
|
to the left and behind the serried ranks of false summits on the Vorderer
|
|
Schwarzmooskogel. On the far right, Bräuning Nase can be seen.</td>
|
|
</tr></table>
|
|
|
|
<p>(More views to follow - however, there's no point until we have actually
|
|
identified the summits on the views with complete certainty :-)</p>
|
|
|
|
<hr />
|
|
|
|
<ul id="links">
|
|
<li><a href="index.htm">Expedition Handbook</a> - Intro
|
|
<ul>
|
|
<li><a href="look4.htm">Prospecting guide</a></li>
|
|
<li><a href="survey/index.htm">Surveying guide</a></li>
|
|
<li><a href="rescue.htm">Rescue guide</a></li>
|
|
<li><a href="rig/rigit.html">Rigging guide</a></li>
|
|
<li><a href="photo.htm">Photography guide</a></li>
|
|
</ul></li>
|
|
<li><a href="../infodx.htm">Index to info/topics pages</a></li>
|
|
<li><a href="../indxal.htm">Full Index to area 1623</a>
|
|
<ul>
|
|
<li><a href="../areas.htm">Area/subarea descriptions</a></li>
|
|
</ul></li>
|
|
<li><a href="../index.htm">Back to Expedition Intro page</a></li>
|
|
|
|
<li><a href="../../index.htm">Back to CUCC Home page</a></li>
|
|
</ul>
|
|
|
|
</body>
|
|
</html>
|