2018 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 2018.

SerialIncidentReports
18/7Ten minutes into a dive to a maximum depth of 25m, a junior diver lost control of their buoyancy and ascended from 21 to 8m over a period of 30-40 secs. After regaining control they descended back to 14m where they met their buddy and continued the dive for a further 25 mins without incident.

Approximately 90 mins after surfacing the diver complained of discomfort in their elbow. Following an examination of the affected area, the DDMO was contacted who directed that a number of checks were to be completed. Following these and a later series of checks it was decided that the issue was muscular rather than DCI. The diver was advised to take things easy and continue to drink plenty of fluids.
18/6A diver conducted two multi-level dives; one to a maximum depth of 30m for 34mins breathing Nitrox 32 and the second to 27m for 29 mins on air. Due to a navigation error the last dive required a 250m surface swim back to the shore but otherwise there were no issues with either dive and all divers reported feeling well.

Approximately 7 hrs after surfacing the diver reported that he'd had pins and needles in the palm of his hands from approximately 75 mins after surfacing. A neuro check was conducted and contact made with the DDMO who stated that a medical examination needed to occur.

This took place at a local hospital and a 5hr treatment of oxygen was given, along with fluids and an ECG. Four hours later the casualty was placed in the RCC, along with a person undergoing hyperbaric therapy, and a full treatment conducted. The diver was subsequently discharged pending further investigation

During the hospital treatment the diver revealed that they were allergic to Glyceryl trinitrate (GTN) which came as a surprise to members of the expedition who were unaware of this.
18/5At the conclusion of a 20 minute dive to 25m, most of which was spent shallower than 12m, a diver made a speedier ascent than normal from 5m. The diver had been breathing Nitrox 32 throughout the dive with air set on both dive computers as a safety factor. Neither computer showed any abnormalities for the dive.

Shortly after surfacing, the diver complained of a headache and then began to vomit. The DDMO was contacted whilst the diver was placed on oxygen and evacuated to a RCC.

After US Navy Table 5 treatment, the diver reported feeling fine and was discharged.
18/4Two divers were conducting a depth progression dive for a Dive Leader down to 40m. At 37m, one of the divers exhibited signs of discontent and erratic breathing with an indication that they wished to ascend.

The buddy assessed the diver as panicking and provided assistance during the ascent including ditching air from the BC to keep the ascent within parameters. At 10m the diver had regained control such that they were happy to conduct a 3 minute safety stop at 6m. Both divers were recovered from the water onto a boat.

The diver was visibly shaken and placed onto oxygen as a precaution whilst the DDMO was contacted. Concurrently the diver was recovered to the nearby military chamber where full neuros were completed. It was assessed that the diver had an anxiety attack that may have been brought on by narcosis.

The diver was told not to dive for 24 hrs.
Close monitoring of divers conducting depth progression is important. If a diver is in distress then a buddy needs to provide positive assistance.
18/3During a planned decompression dive to 32m, a diver was wearing two computers from the same manufacturer that used the same algorithm. Towards the end of the dive they notice that the secondary device required significantly more in water stops than the primary.

In order to clear the stops on both computers, additional gas was required and a signal was sent to the surface requesting more. This was deployed and the divers completed the higher level of stops returning to the surface without further incident.

A subsequent download of the secondary computer revealed significant anomalies on other dives that indicated that it was unserviceable.
If using multiple computers then divers should always monitor them all.

The ability to deploy additional gas to divers conducting decompression stops is very useful under certain circumstances.
18/2A group of service divers observed a civilian group in distress following a dive to 20m. They assisted with the recovery to shore and provided oxygen until the emergency services arrived. Subsequently it was learnt that the casualty made a full recovery and was grateful for the assistance that they had received.
18/1Whilst diving to 7m, a diver was unable to clear there ears. After visiting a walk in clinic, and phone consultation, with the DDMO they were prescribed medication and did not dive for 5 days.

Further details on incident reporting and the latest form can be accessed at this page.