I was nerding out, watching some jet porn, and I noticed an odd hose between this F-16 drivers O2 hose and helmet. Does anyone have any idea what it is? I was thinking maybe some type of oxygen monitoring system...?

Just because of where it attaches to the helmet...new style (e.g. "over-engineered) comm cord?
Well, his helmet/visor combo doesn't seem to include that capability...but you may be right...a "future growth" cable that came to the helmet before the visor system...Perhaps it has the JHMCS harness in it as well?
I was nerding out, watching some jet porn, and I noticed an odd hose between this F-16 drivers O2 hose and helmet. Does anyone have any idea what it is? I was thinking maybe some type of oxygen monitoring system...?
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Every hornet dude has elastic bands. They're BSing you.
That looks way more inconvenient than the pigtail.Comm cord.
Also don't believe them when they say the old mbu-12 mask doesn't work with jhmcs. It does, but they bought a contract for these shitty masks and that's what they have parts to support now.