Nice, Capt!

Everyone pulled together nicely to get to the bottom of this.

So, here's a question:

What was the thought process behind the design for the knife so that it would fit their needs in space? I have read that they couldn't find a knife appropriate for their mission and eventually turned to Randall to make a knife.

So, does anyone know what criteria they were looking for? What uses specificially did they see the design fulfilling while on their mission?

Or did they simply want a knife able to hold up in the event of using it in a survival mode once they returned to earth and before they could be picked up?