Furhter updates to bivi rigging diagram and description

handbook/bivirig.html

@@ -14,18 +14,18 @@ nights that might result if it's not done well enough. Starting from
 the bare space it's really quite hard to know where to start if you've
 not done it before, so this doc attempts to provide some advice.</p>
 
-<p>Until 2014 we had a shortish green tarp (10mx6m) wrapped up the back edge at upper entrance and a separate tarp for that upper area. It wasn't very good. In 2015 we bought a much longer big white tarp (15x6m) which covers the whole rear area down to the ground. In 2024 we bought a replacement but due to a documentation error that one is 15x10m which is really too wide. This description has been updated for the 2024-on version.</p>
+<p>Until 2014 we had a shortish green tarp (10mx6m) wrapped up the back edge at upper entrance and a separate tarp for that upper area. It wasn't very good. In 2015 we bought a much longer big white tarp (15x6m) which covered the whole rear area down to the ground. In 2024 we bought a replacement but due to a documentation error that one is 15x10m which is really too wide. This description has been updated for the 2024-on version.</p>
 
 <p>There are two essentially-separate jobs:
 <ol>
 <li>the
-<a href="water">water-collecting tarp</a>, and </li>
+<a href="water">water-collecting tarps</a>, and </li>
 <li>the <a href="#main">main tarp</a></li>
 </ol></p>
 
 <p>If there is any chance of it raining soon, <strong>start with the <a href="water">water
-tarp</a></strong>, as you <strong>really</strong> don't want to miss collectingt all that water, and
+tarp</a></strong>, as you <strong>really</strong> don't want to miss collecting all that water, and
-setting up in the rain is rubbish.</p>
+setting it up in the rain is rubbish.</p>
 
 <h2>Terminology</h2>
 
@@ -51,12 +51,14 @@ right size (15x6m)). The 2024 tarp is 3-4m wider than the bivvy, so
 has to be folded along the long axis to work. It is 15mx10m. </p>
 <img src="i/bivirig.jpg" alt="Drawing of post-2024 tarp layout" width=800>
 
-<p>Start with the big white tarp. The long edge goes from front to
+<p>Get out the (heavy!) big white tarp. The long edge goes from front
-back of the bivi. The basic position is that it goes all the way to
+to back of the bivi. The basic position is that it goes all the way to
 the right wall, partly 'underneath', and the left hand edge crosses
-the steps up the middle. The back edge reaches the floor behind the
+the steps up the middle, covering the whole width at the back. The
-top 3-person flat area at the back entrance. The front edge comes down
+back edge reaches the floor behind the top 3-person flat area at the
-to ground level.</p>
+back entrance. The front edge comes down to ground level. Someone may
+have written 'front' and 'back' on the tarp to initially orient
+it.</p>
 
 <p>So start by opening it out to full length over the sleeping areas
 to the right of the steps, and folding 3.5m of the right hand edge
@@ -67,16 +69,16 @@ in place, then install the four main ropes to lift it up. Then
 finalise the tarp position and tension it.</p>
 
 <p>Once the tarp is somewhat spread out, get the 4 main ropes in place
-underneath it.  Use the anchors shown on the diagram. The secret to
+underneath it.  Use the anchors shown on the diagram that are known to
-the middle rope is _not_ to use the obvious ceiling bolt which is hard
+work. The secret to the central rope '2' is _not_ to use the obvious
-to reach; instead tie the rope to a tension rope (5) above the
+ceiling bolt which is hard to reach; instead tie the RH end of rope 2
-steps. This allows the tarp edge to come further left and run square
+to a tension rope '5' above the steps. This allows the tarp edge to
-to avoid sagging. Tension rope 2 first, then 1,3,4 to lift the tarp up
+come further left and run square to avoid sagging. Tension rope 2
-and ensure it is neatly spread. You will need bungee-balls to hold the LH
+(with rope 5) first, then 1,3,4 to lift the tarp up and ensure it is
-edge of the (folded) tarp in place.  To get good tension on the main
+neatly spread. You will need bungee-balls to hold the RH edge of the
-lines thread them through a maillon, and tie off on another bolt. You
+(folded) tarp in place.  To get good tension on the main lines thread
-don't need to add any new ones - there are more than enough bolts
+them through a maillon, and tie off on another bolt. You don't need to
-now.</p>
+add any new ones - there are more than enough bolts now.</p>
 
 <p>At the left-hand end of rope 4 the tarp gets scrunched round the
 anchor. This is fiddly to get it all to hang nicely. The objective is
@@ -85,10 +87,10 @@ the water runs down the top and out the front, rather than collecting
 in 'buckets', which then drip. That means that it has to be fitted
 quite 'flat'. To make this theory actually work, add extra lines in a
 zig-zag pattern between the main ropes so no buckets can form. Don't
-tension them too hard as they distort the main ropes - it's a
+tension the early ones too hard as they distort the main ropes - it's a
 balancing act to get the tension everywhere right.</p>
 
-<p>To keep the electrics dry the edge of the tarp is held taut with string to concrete screws in this area</p>
+<p>To keep the electrics dry the edge of the tarp is held taut with string to concrete screws in this area.</p>
 
 <p>At the front edge the tarp lays over rocks. Put some padding
 (karrimat/old tarps) over the rocks to avoid damage to the new