Discussion about EAD & END terminology

Dirk Hohndel dirk at hohndel.org
Mon Dec 9 11:33:27 UTC 2013

On Mon, 2013-12-09 at 20:32 +0100, Salvador Cuñat wrote:
> Good Night.
> Totally agree with both of you, Willem and Henrik.
> Till now never heard of EAD meaning narcotic depth, but as I'm not
> technical diver it didn't sound too strange to me.
> In fact I was filling a bug form in trac when remembered the thread
> about this topic, but it wasn't really discussed. The tread evolved on
> deco and deco stops and no one payed attention on this, so simply added
> the advice on user-manual.
> If I had to vote, I would change this to the most accepted meaning:
> EAD --> Equivalent Air Depth
> END --> Equivalent Narcotic Depth  (N2+O2).
> This would fit most recreational divers and only requires swapping the
> variables in profile.c and remove the note on the manual. No
> translation issues, fast and clean.
> In the long run, I would add an EAD(He) taking account on He for deco
> pourposes.  But this will probably have to wait to 4.1, I think.

Will this cause us string changes? If yes, then please wait until after
4.1. Otherwise, since everyone seems to agree... let's fix it.

The person who defined the current meanings (IIRC) is sadly no longer
able to argue back (I haven't checked but I'm reasonably certain this
was Jan).


More information about the subsurface mailing list