Structure

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0 height="100%"><tr> <td valign="top" width=200 BGCOLOR="#000000" TEXT="#F7F7FF"> <div> <A HREF="id28.htm" TARGET="_top" TITLE="Bubbles"><U><IMG SRC="0400b0b0.png" border=0 width="11" height="11" ALT="previous" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A>   <A HREF="id30.htm" TARGET="_top" TITLE="Suspended in air"><U><IMG SRC="0410b0b0.png" border=0 width="11" height="11" ALT="next" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A>       <IMG BORDER="0" SRC="1x1.gif" HEIGHT="11" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="11">   <A HREF="index.htm" TARGET="_top" TITLE="Diving the cenotes"><U><IMG SRC="0430b0b0.png" border=0 width="11" height="11" ALT="up" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> <bR> <div> As you can see, we are still within sight of ambient light, but it's a fair way off.</div> </td> <td valign="top" BGCOLOR="#000000" TEXT="#F7F7FF"> <div> <FONT SIZE="5" COLOR="#FFFFFF" FACE="Arial" ><B>Diving the cenotes</B></FONT>    |     <A HREF="index.htm" TARGET="_top" TITLE="Diving the cenotes"><U>home</U></A></div> <div> Structure</div> <div> <B><IMG SRC="0923e9b0.jpg" border=0 width="574" height="411" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> </td> </tr></table></body>