Yes it can be quite confusing as both "thou" and "mill" both mean one one-thousandth of an inch. (therefore 100 thou is 100 thousands or 0.1)The way he/she/it says 100 thou makes me think 100,000 for some reason! It is a bit vauge! We need more info!!!!
I believe NASA use the metric system, don't they?tough luck its in imperial but then the Americans put the man on the moon not the europeans.)