Richard Deitsch highlights this chart showing the possible depth of MH370’s black box. I’m not copying it here because it is one long chart.

Two things the chart does well:

1. On the way down to 15,000 feet, it shows relative heights and depths of other objects. Buildings don’t even come close and animal life is limited.

2. The effect of continued scrolling highlights just how deep the black box may be. The chart could have shrunk to fit the screen or a typical newspaper page but it would then lose the interactive element of going down more and more.