I touched exactly this topic already once in this thread:
http://forums.deeperblue.net/safety/...ing-death.html (post #115), but Erik is right that Wikipedia is probably the only source defining SWB in this unusual way (well, there is certainly another one where Wiki took it from), but it is true that by SWB, is generally meant the depressurizing BO. Apart from Wiki, I yet have to see another place using their definition. At freedivers and spearos definitely SWB = ascent BO.
And from historical point of view this definition (SWB = ascent or depressurizing BO; DWB = BO in depth because of narcosis or gas toxicity) is much more justifiable, because the exact term "Shallow Water Blackout" was first used by S. Miles in early times of closed circuit rebreathers for inexplicable blackouts of rebreather divers in shallow depths. S. Miles discovered the depressurizing effect at the ascent and bedsides the term SWB used also the name "latent hypoxia" (source:
Shallow Water Blackout)
I think it would be proper to try editing the Wiki entry accordingly.
Personally, since I am aware of the potential controversy, I usually refer to this type of blackout as "depressurizing" or "ascent BO", which is less misleading than the term SWB.
PS: the above mentioned thread
http://forums.deeperblue.net/safety/...ing-death.html is quite interesting and may be worth of reading if you are interested in the topic, or concerned about safety
