Monthly Archives: January 2019

2019 JS Diving Incident Reports

The table below contains a sanitised version (no names or units!) of the service diving incidents that have been received by JSSADC in 2019.

SerialIncidentComments
19/20A trainee diver experienced difficulty equalizing their ears whilst conducting OO1. The dive was aborted and the diver sent for medical examination. Subsequently they were diagnosed with inflammed ear drums and removed from diving for 10 days.
19/19A trainee diver experienced difficulty equalizing their ears whilst conducting OS3 in a SWTA. The dive was aborted and the diver sent for medical examination. Subsequently they were cleared to continue diving
19/18A trainee CCR diver had descended to 13m, had switched to high set point and was in the process of conducting a linearity check. At this point the handset went into error, flicked between PO2 readings and went dead. The diver bailed out onto a 7 litre cylinder and recovered to the surface using their backup computer.
19/17During a CCR air diluent course, a trainee failed to hold a safety stop at 6m and gradually drifted to the surface. On arrival at the surface they were recovered to the boat.
19/16Whilst conducting training lifts on OO2, a trainee found they could only clear their ears by descending very slowly. This meant that it was not possible to complete all lifts during the table limits for the dive.

The trainee was taken to a doctor who was unable to find any problems but advised them not to dive the following day.
19/15An Ocean Diver trainee was unable to clear their ears after a CBL during OO3. The dive was aborted and the diver taken to a doctor who diagnosed slight redness of the ears and a possibility of a minor barotrauma. The trainee was unable to complete the course.
19/14An instructor on an Ocean Diver entered the water via a stride entry at which point their pony regulator started to freeflow. The instructor was able to turn it off and then back on again which stopped the freeflow.

With approx 100bar left in the cylinder, the instructor elected to continue the dive to 10m. No further problems were experienced.
19/13Following a dive to 14m for 17 mins, a diver experienced a headache after their evening meal. When they woke the next day the headache was still present so the DDMO was contacted.

The DDMO advised a visit to the local chamber where the doctor conducted recompression treatment which did not alleviate the symptoms. Subsequently a CT scan was also conducted to check for a stroke which did not identify any cause for the headache.

Subsequently the diver felt better and the headache has not returned.
19/12Following successful completion of OS1-3 in a swimming pool, a diver was completing OS4 in a SWTA. At a depth of 2.5m they indicated that they wished to ascend and on surfacing reported that they were unable to clear their ears.

The diver attended the medical centre but no ear problems were observed.
19/11A diver was carrying a twinset on their back when one of the shoulder clips failed. The increased weight caused the second clip to fail and the twinset fell to the floor bruising the diver's calf.
19/10During OS4 in a SWTA, a trainee diver signalled up to his instructor. On the surface the diver explained that they felt faint and were unable to clear their ears.

The dive was aborted and the diver was subsequently found fit to continue diving by a doctor.
19/9A diver realised that they required extra weight so placed it in the pocket of their BCD. During the dive this became dislodged and fell onto the seabed.

Although the weight was found by another diver in the group they did not try to ascertain whether it had been lost by anyone.

During the safety stop, the diver who had lost their weight was unable to control their buoyancy and slowly drifted to the surface.
19/8During an ADP dive, a diver switched to their 50% stage regulator and immediately received a wet breathe. The diver returned to their back gas until the buddy could hand over their own stage with a 50% mixture.

The regulator was inspected by a qualified technician on surfacing but no problem could be found with it.
19/7On surfacing a twinset diver heard an unusual noise from their wing. On investigation the wing dump valve was found to be u/s
19/6A diver entered the water and immediately signalled to the boat that there was an issue. When they were recovered to the boat it became clear that the diver's dry suit zip had not been closed.
19/5A CCR diver was operating from a hard boat with an unusual bench seat arrangement. In order to prevent twinsets slipping, a thin vertical angle bracket was installed on the seats.

Whilst kitting up in a swell, the CCR diver moved sufficiently that the angle is likely to have damaged the diluent cylinder. This was noticed when the diver entered the water and the dive was aborted.
19/4During a training Alternate Source ascent, a diver's fin came off and was lost. The buddy elected to carry out a CBL on the diver without a fin and both divers surfaced without further incident.
19/3Two divers were conducting training CBLs from 20-6m. After one successful ascent a diver was unable to equalise sufficient to allow a descent. The dive was aborted.
19/2A pair advanced divers were refreshing their skills by conducting two CBLs from 20-6m. During the second lift, one diver was unable to dump gas from their dry suit quickly enough to prevent both reaching the surface.

Subsequent analysis showed the that the dry suit auto dump valve was not operating correctly due to damage probably caused during transit to the dive site.
19/1During the ascent phase of a planned deco dive to 40m, two divers deployed DSMBs mid-water. At 6m one of the divers became entangled in their DSMB and slowly ascended to the surface missing 1m of stops.

The diver was placed on oxygen and the DDMO contacted. Following advice the diver was removed from oxygen and sent for a medical examination after which he was pronounced fit to conduct diving.



2019 Expedition Allocations

Expedition slots at JSSADC have now been allocated for 2019 as follows

DateUnitReserve
30-31 MarRESDAATR (Winchester)
19-22 AprRAF CosfordRAF Odiham
03-06 MayRAF CosfordRAF Brize Norton
01-02 JunRESDA
06-09 JunTrenchard Divers
15-16 JunRAF Brize Norton
22-23 JunRAF Benson
29 Jun-01 JulRAF Odiham
13-14 Jul22 ENGR REGT
20-22 JulRAF Brize Norton
24-25 Jul22 ENGR REGT
26-29 JulRAF Cosford
03-04 AugRAF Benson
10-11 AugTrenchard Divers
24-26 Aug159 Regt RLCRAF Cosford
31 Aug-01 SepRAF Cranwell
06-08 SepRNRM (AGM)RESDA
21-22 SepRAF Brize Norton
28-29 SepRAF Benson
03-06 OctRAF Odiham
12-13 OctRAF Cranwell
19-20 OctRAF Cranwell
28 Oct-01 NovRAPTC (JSATWC)

This means that any date not shown in the table above is now available on a first come first served basis.  If you’re interested then please read JSSADC Expedition Slots 2019 and complete the bidding proforma