Sonomatic Confirmation Of Tracheal Intubation
Continuously tells you tube position while you are intubating.

If after it has had time to load the program you just see a white screen try to use: Java's own plugin

Drag  the mouse across START to begin.  Then drag the end of the tube to intubate.  

If you don't like mouse dragging (possibly because your computer is slow to respond) and are into mouse clicking try.
 Scoti mouse click.