diff --git a/handbook/essentials.html b/handbook/essentials.html
index 511fe5945..704f3c27d 100644
--- a/handbook/essentials.html
+++ b/handbook/essentials.html
@@ -36,13 +36,16 @@
   <li>OsmAnd defaults to not displaying labels on the waypoints (caves and camps). Tap on a point to reveal what it represents.</li>
 </ul>
 <p><b>If the quick start doesn't work for you, go to the <a href="#general">general instructions</a> further down this page.</b></p>
+
 <h2>GPS for prospecting</h2>
+
 <p>When using your phone for prospecting for new caves, or refinding old entrances, there are two further useful files that you should consider downloading:</p>
 <ul>
   <li><a download href="gps-essentials/entrances2024.gpx">entrances2024</a> - location of all known cave entrances.</li>
   <li><a download href="gps-essentials/kataster-boundaries-as-tracks.gpx">kataster-boundaries-as-tracks</a> - these are <b>not paths</b> but separate areas with 
 different mapping designations. 
     These are the smooth, curved lines. They are used by prospectors when naming new caves.</li>
+  <li><a href="https://www.cavinguk.co.uk/info/locatingsurveys.html">Location fixing: How to obtain a fixed point for a cave survey</a> "Galileo High Accuracy Service (HAS) is due to become partly available in 2022 and fully available in 2024, which will offer RTPPP for free around the world, both via satellite and network connections. And there will be much rejoicing. "
 </ul>
 <h3>Adding aerial photo data overlay to OsmAnd on Android, 2024</h3>
 <ul>
@@ -205,6 +208,8 @@ repo downloaded onto it (e.g. the <i>expo laptop</i>) rather than on the server
 both of which are stored in the <var>:loser:</var> repository in :loser:/gpx/ .
 <p>Read the <a href="troggle/make-essentialsREADME.txt">README</a> file in that directory.
 <p>They are documented in the long list of <a href="troggle/scriptsother.html">Other scripts</a>.
+  <h3>The future</h3>
+ <p> <a href="https://www.cavinguk.co.uk/info/locatingsurveys.html">Location fixing: How to obtain a fixed point for a cave survey</a> "Galileo High Accuracy Service (HAS) is due to become partly available in 2022 and fully available in 2024, which will offer RTPPP for free around the world, both via satellite and network connections. And there will be much rejoicing. "
 <hr />
 
 <li><a href="../index.htm">Back to Expedition Intro page</a></li>