I was shopping for a spotting scope online today and came across a new brand "Athlon Optics." Their description included this beaut:
Argon Purging uses the inertia gas with bigger size molecules to purge any moisture out of the tube giving you better waterproofing and thermal stability.
"Inertia Gas" -- LOL. I guess that gas is slow to get out of bed in the morning. After it's first cup of coffee, it's raring to go and get to work!
Millennial copy writers just don't do their work very well.
So you’re saying the scope has (is?) an inertial guidance system?