I do not know the cave, but to me it seems there is no "sump" to pass for this specific dive and it is a continuous tube from water level entry point of this dive to water level exit point of this dive.
Did they instead have to walk through the Luft-Kammeret?
Notable problems to overcome are the longish deep section and one major restriction requiring kit removal at 110 meters after the deep section (...and the cold water and long deco...).
I'd understand better if someone could mark exact entry and exit points for this dive
The earlier posted
"Diving Project Plurdalen 2013" report by Mr. Sami Paakkarinen includes a
map at the very end of the report. IF you combine this report with the description of the fatal dive Feb2014, you might get the following interpretation of events:
1) In February 2014, two teams commenced their dives at the Plura entrance. First team consisting of divers 1 and 2. Second team of diver 3, 4 and 5. The teams had rebreathers, bailout rebreathers, bailout gas and DPVs. Team 2 followed team 1 with an interval of about 2 hours. [The divers were experienced cave divers.]
2) The dive begins with a first sump of max 34m depth and 450m length.
3) Then there is a air chamber (=Luft kammeret in Norwegian) that is 250 long. [According to the report, the habitat of the 2013 team is said to be located over 500m from entrance. Based on the distance, this might be at the first sump side of the air chamber. The reports do not include information whether this habitat was left behind or not.]
4) After the air chamber, the dive continues in a second sump that extends 1.4 km from the Plura entrance and max 135m depth. Below 100 depth the tunnel gets smaller and there is a restriction at 125m [not to be confused with the fatal restriction]
5) This second sump was connected by the 2013 team to the Steinugleflåget cave system at 130m depth. [According to the 2013 map this 130m deep section seems not much longer than 100m. It is not evident whether this connection is at the end of the 2nd sump or already earlier].
6) After this deep section the first (Feb2014) team ascends and Diver 2 gets stuck in a restriction at about 110m whilst Diver 1 has already passed the restriction. Additionally, Diver 2 faces problems with his RB and eventually dies. [One can only speculate of the possible physical damage or fault of the RB of Diver 2 and whether the stress levels affected breathing.] After unsuccessful rescue attempts and the fatality, Diver 1 continues the traverse towards the near Steinugleflåget exit.
7) The second (Feb2014) team reaches this same fatal restriction during their ascend after the deep section.
8) Diver 3 tries to free [the already dead] Diver 2. Then Diver 3 removes his own equipment in order to succesfully pass the restriction.
9) The remainder of the traverse for Divers 1 and 3 has a distance of couple of hundreds of meters and they see each other in the water whilst decompressing.
10 Finally at the Steinugleflåget exit there is a dry cave section that is 300m long and rises steeply up 100m from water level.
11) Meanwhile, on the deep side of the fatal restriction, Diver 4 faces difficulties with his rebreather and dies despite bailout to oc and help from Diver 5. [One can only speculate about the mental stress of seeing the exit blocked close to the end of a long dive, plus the stuck diver, and, whether this would result in overbreathing the RB and a CO2 hit.]
12) After unsuccessful communication with Diver 3, Diver 5 decides to return back the same, much longer, route which increases his deco obligations. I.e. he returns via the 130m deep section in the Plura 2nd sump, the air chamber and the Plura 1st sump. At some point his DPV fails. [We, Scubaboard readers, do not know whether Diver 5 was able to use the habitat of the 2013 team - was it left there?] Diver 5 exits succesfully at the Plura entrance after having cut short some of his deco.
N.B. The above is a none-official
summary of the two reports alone without any further references.
