On re-reading the grandparent post, it seems even more likely it was just a typo of 'DC' for Damage Control. I say that because it wasn't referring to actual steam lines, but rather drains.

Some auxiliary steam lines might be zebra fittings and secured for General Quarters, but steam to primary mission systems like the catapults on a carrier would only be secured if actually damaged, not as a precaution. Most drains however are secured for condition zebra.

So it was more like "...steam lines, leading to condensation, requiring additional drains... and the additional DC valves to go with them."

'DZ' may be a broken reference to "Zebra Fittings", meaning valves that must be shut in every compartment when the ship goes to material condition Zebra (as for General Quarters or Battle Stations). Electrical systems are controlled at a central switchboard, but at every point where a steam line crosses a water-tight bulkhead, there will be additional valves that can be secured to isolate that space for damage control purposes. Those valves bring additional maintenance themselves.

The 'D' means that fitting would be secured for Darken Ship also, which would be odd for a steam valve. An external door would be marked 'DZ', or "Dog Zebra", because you would secure it for either condition Zebra or for Darken Ship.

Roger that. An AC posted the relevant part of the Contribution agreement above:
"User hereby irrevocably and perpetually assigns, transfers, conveys and sets over to OISF, and OISF hereby accepts the assignment, transfer, conveyance and set over, User's entire worldwide and perpetual right, title and interest in and to the Materials including but not limited to all Intellectual Property Rights in the Materials. User will give OISF or its designee all assistance reasonably required to register, perfect, enforce and apply for and obtain in OISF's name patent, copyright, trademark and other Intellectual Property Rights in any and all jurisdictions"

I guess the remaining question is, does SNORT use the same smelly tactic?

From the OISF Download page:

"The Suricata Engine and the HTP Library are available to use under the GPLv2."

Followed on page 2 of same by this:
"Membership in the OISF Consortium Group provides a non-gpl limited license for the Suricata IDS engine in return for ongoing support. There are multiple tiers available for consortium participation that simplify the varying levels of support and involvement possible for all types of interest. Contributions may range from man hours in development assistance, technology donations, hardware and infrastructure, to financial assistance."

I get that if the code is their copyright, they can dual license at will. But doesn't the above mean any contributions from either a community or "Membership" cannot themselves be GPL, since any code accepted will in turn be distributed "non-gpl" among the membership? Also, are there "multiple tiers" of "non-gpl limited license"?

Now, to see how much explosives it takes to MAKE it fail!

This is my favorite part! :-)

Insurance fraud!

Is there an obvious plan for the crawler failing half way up the cable? In this test you just set it down with the chopper, but what do you do half way to geosync orbit?

I guess a second crawler has to go up underneath the failed one, trigger some kind of mechanical release and carry its dead weight down.