derek

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derek last won the day on April 25

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About derek

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  • Birthday 03/01/1957

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  1. Link to new DCI modelling http://www.news-medical.net/news/20170315/Researchers-create-new-model-for-predicting-severity-of-decompression-sickness-in-divers.aspx Scroll to the bottom of the page to download the document as well The link to the journal PLOS ONE article is below. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0172665
  2. Open Attached Excel sheet IMCA on line Video Links April 2017.xlsx
  3. Interesting link to new DCI modelling http://www.news-medical.net/news/20170315/Researchers-create-new-model-for-predicting-severity-of-decompression-sickness-in-divers.aspx Scroll to the bottom of the page to download the document as well The link to the journal PLOS ONE article is below. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0172665
  4. Hi John, All credit to making this happen, but I have reservations that the course would only benefit the schools and not the divers working in the industry. Divers have been hard hit by the reduction of work and still expected to maintain certain diving certification to keep in work. Therefore I’m against anything that would impose any additional cost to the diver rather than the diving contractor. So providing the diving contractor is paying for the training that would be OK. I now work only in the North Sea and we very rarely use any hot working cutting equipment apart for cutting out the odd bracket or stuck bolt as all the clients prefer cold cutting methods which in some cases are a lot quicker and safer. We actually used it for the first time in 6 years on the last job for about an hour’s work as it was the only method of work that would suffice. God knows when I’ll ever see it used again. They tried to impose an underwater lifting and rigging certificate for divers here in the North Sea which I viewed with contempt for the course made no recognition to prior experience. I won the day as I would only support the issue if the certification came under a recognised educational route with a recognised trade organisation which would have meant the employers and the training schools having to pay a body to write up and get approved as a considerable cost. Once that hit the table they dropped the idea. So my question would be which certification body would write up and approve the training establishments for such training and would the certification within a certified trade body be transferable within that educational bodies existing qualification structures. Derek Moore
  5. Sat Job
  6. I have seen a recording of the incident and I won’t release the recording so as not to identify the sender. In my opinion the leak was so great the sea was bubbling up metres above the water and had the potential to cause the vessel severe stability issues. I'd be interested to see if this IMCA member company do report the incident.
  7. Getting information of an incident off Iran possibly on the Optimus (ex-Acergy Harrier). Company I’m told is the MEDS from the Middle East. Job was undertaking a repair on a damaged 32” pipeline involving tying in a new spool to an existing pipeline flange. Incident involved a serious loss of gas via the open pipeline with the resultant release of small quantities of H2S whilst the two divers were in the water and the vessel was attached to the spools and pipeline by 2 x cranes meaning the vessel was unable to move off location. It is suspected the refinery opened a valve and sent the gas down the pipeline. The H2S wasn’t of sufficient quantity to cause respiratory incidents other than the foul smell it dissipates but the significant gas release from the pipeline caused a lot of persons to be alarmed when the abandon ship alarm sounded. I am led to believe the incident was eventually brought under control with no loss of life and luckily the gas did not reach an ignition source.
  8. See Attached IOGP Diving Safety Alert.docx
  9. Hi All, It has come to the attention of some that DMAC 12 Rev 1 – Safe diving distance from seismic operations is not providing the adequate protection required. Attached. DMAC 12 calls for a risk assessment at distances of 10km. However there have been reports from divers that they are being affected by Seismic noise as much as 23km to 27km away. Obviously the guns are getting larger and more sophisticated and as the majority of the seismic surveys are carried out independently of the operators they are not prepared to supply other than basic information. What is needed is for DMAC to update their guidance should it become evident that modern firing methods are presenting a hazard Have any divers or diving supervisors had to abort a dive due to seismic noise where the vessel has been more than 10km away. Reply to diveatderek@aol.com or leave a message on the forum privately or publically as I am collating any evidence. Regards Derek Moore DMAC12.pdf
  10. This Youtube footage shows the rescue of a diver whose umbilical parted during a DP run off by the vessel in 2012 and was left on the job. Fortunately he lived thanks to the efforts of his dive team and the high Partial Pressure of Oxygen in his bailout cylinders combined with the cold water which most likely caused his body to shut down to conserve heat and consequently the production of CO2. He recovered fully. https://www.youtube.com/watch?v=x4dcxL-b-l0
  11. The Youtube Link shows what happens when you fit the wrong threaded valve to a cylinder. Fortunately no one was killed but 2 were injured. https://www.youtube.com/watch?v=6KbFYgsOSmo&feature=youtu.be
  12. National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA) revealed a recent incident where a vessel lost position while diving activities were being conducted approximately 130 metres from a hydrocarbon facility offshore Western Australia. According to the report, the loss of position was caused by a deactivation of the forward/aft automatic positioning function by unintentionally deselecting the ‘surge’ button on the DP (Dynamic Position) console located on the bridge which then deactivated the ‘auto position’ mode. The deselection was thought to have occurred by the placement of a notepad on the side of the console. The vessel drifted off location by over 40 metres and this drift was initially noticed by a diver when his umbilical started to become taut. Once the DPO (Dynamic Position Operator) became aware of the excursion, the ‘auto position’ mode was reactivated causing the vessel to stop moving and remain in position. During this time, the diver had followed his umbilical, moved clear of any obstacles, and walked with the vessel, said NOPSEMA in its safety alert. A loss of position during diving could cause diver fatalities if their umbilicals or other equipment becomes entangled or snagged on subsea infrastructure during the excursion. A loss of position whilst working in close proximity to a hydrocarbon facility could also potentially cause a collision, leading to a loss of hydrocarbon containment and subsequent fire or explosion. In both cases the consequences could involve multiple fatalities. NOPSEMA’s investigation identified that the auto DP mode buttons (Surge, Sway and Yaw) were located in the left hand corner of the console next to desk space commonly used for completing DP related checklists and logs. Consequently, these buttons were susceptible to accidental activation by personnel. The inspectors found that although the incident arose by an accidental and unknowing double press of a button by the DPO, the design of the DP system allowed a human error to escalate this act into a dangerous occurrence by neither requiring any positive confirmation of deactivation of ‘auto position’ mode nor providing any alarm that required acknowledgment that ‘auto position’ mode had been de‐activated. The situation was exacerbated and recovery impeded as deselecting the ‘surge’ button automatically deactivates the excursion alarms in that axis and the DP display was no longer providing useful feedback in terms of the loss of position event as the excursion rings started to track with the vessels movement. If either of the controls identified above were in place, it is unlikely the incident would have escalated to a loss of position event. In order to rectify the issue the operator, with assistance from the manufacturer, are currently upgrading the control systems software to provide a separate dialogue box confirmation requirement when deactivating the ‘auto position’ mode. Source: NOPSEMA
  13. See Attached file IOGP safety alert number 275.docx
  14. Your correct Mark, the larger ones are around 16 tons with a max speed of 6 knots in calm waters, against a head wind and tide it's going no where. However the Mi-26 (Russian chopper) can lift is 19,99 Tons (44,090 lb) http://www.businessinsider.com/russia-mi-26-helicopter-llft-biggest-2014-5?IR=T
  15. I Have a copy which is 46mb PDF file so I'll send if you PM me with your email address