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Clearance diver

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A US Navy work diver is lowered to the sea bed during a dive from the USNS Grasp (T-ARS-51) off the coast of St. Kitts.
Preparing to raise a mine from the seabed

A clearance diver was originally a specialist naval diver who used explosives underwater to remove obstructions to make harbours and shipping channels safe to navigate, but the term "clearance diver" was later used to include other naval underwater work. Units of clearance divers were first formed during and after World War II to clear ports and harbours in the Mediterranean and Northern Europe of unexploded ordnance and shipwrecks and booby traps laid by the Germans.

History

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Clearance Diving takes its name from the operations carried out towards the end and after the Second World War to clear the ports and harbours of the Mediterranean and Northern Europe of unexploded ordnance and booby traps laid by the Germans.This work was undertaken by RN Rendering Mines Safe (RMS) and Bomb Disposal Units and later by Port Clearance Parties or ‘P’ Parties, two of which (Naval Parties 1571 and 1572) went into action soon after D-Day to clear the vast quantities of unexploded ordnance and general debris left after the Allied invasion. They were joined later by other ‘P’ Parties including ‘P’ Parties 1573, 1574, 1575 and 2444 (many of which had Commonwealth naval personnel) and ‘P’ Party 3006 manned by the Dutch.

Work in the European theatre continued until well after the end of the war. Most of the ‘P’ Parties were disbanded, together with HMS Vernon(D) at Brixham, on 30 November 1945. The exceptions were ‘P’ Party 2444, which was still operating at Dunkirk, and ‘P’ Party 2443 which had been formed in June 1945 to deal with residual suspected unexploded ordnance around the UK coast after the war and became based at HMS Vernon, Portsmouth.[1]

The first units were Royal Navy Mine and Bomb Disposal Units. They were succeeded by the "Port Clearance Parties" (P Parties). The first operations by P Parties included clearing away the debris of unexploded ammunition left during the Normandy Invasion. During World War II Navies used the heavy surface-supplied standard diving dress before changing to lighter self-contained rebreather equipment

Training

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Admission to clearance diver training requires the candidate to pass medical and physical fitness screening and to be a member of the relevant military force.[2] Additionally, intense training in diving is needed, as well as training in bomb disposal.

Surface Supplied diving techniques, diving supervision planning and execution, using air (50m) and oxy-helium (HeO2 constant partial pressure) breathing apparatus to 60m.

Diving training will be conducted using in-service RN constant partial pressure heliumoxygen equipment (Clearance Diving Life Support Equipment (CDLSE), air surface supplied Open Space Diving System (OSDS) and Swimmers Air Breathing Apparatus (SABA).[3]

Scope of activity

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The scope of activity for a clearance diver varies depending on the specific armed force in which they are a member, but historically the most defining competence is skills in underwater demolition using explosives. The closely associated skills in explosive ordnance disposal are also generally implied by the designation.

Clearance divers possess the skills of both expert divers and bomb disposal groups. There tend to be relatively few clearance divers on any given naval ship.[4]

Divers are required to go underwater and diffuse bombs (EOD Diver) with a starting salary of over $26,000. [citation needed]

The starting salary is the salary given to a diver who has just finished training and is a new recruit. They gain a profession in warfare.[citation needed]

The final salary, after being apart of the job for long enough, will have a higher pay than a recruit as they have gained more experience. A more experienced diver can have a potential salary of over $62,000. [citation needed]

Nations with clearance diving groups

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US Navy explosive ordnance disposal (EOD) divers

Africa

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Asia

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Europe

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United Kingdom

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photo of man wearing diving gear smoking
Lionel 'Buster' Crabb, using the DSEA at Gibraltar, April 1944.

Royal Navy divers are officially called Clearance Divers.[12] During WWII divers used the Davis Submerged Escape Apparatus (DSEA), no wetsuit or swimfins.[13] On 17 December 1942, six Italian divers (of Decima Flottiglia MAS) on three manned torpedoes attacked Gibraltar harbour. A British patrol boat killed the crew of one with a depth charge. Their bodies were recovered and their swimfins later used by Gibraltar's guard divers (Sydney Knowles and Commander Lionel Crabb). This was the first known British use of swimfins.[citation needed]

In November 1944, following surrender of Italian forces an Italian frogman brought two Decima Flottiglia issue oxygen rebreathers and a two-piece frogman's drysuit to Livorno, for the Allies to use. This equipment proved better than the Davis Apparatus and lasted longer on a dive. After the war and until the 1990s divers used the Siebe Gorman rebreather[14][15] and aqualung.[citation needed]

Training to become a Clearance Diver takes around 7 months. Before trainees are accepted onto a course, they must pass a week-long diving aptitude selection, held at the Defence Diving School, on Horsea Island, Portsmouth. This selection involves passing the Divers Physical Fitness Test (DPFT), tests of physical and mental endurance and surface swimming. The candidates are also introduced to the Royal Navy's Swimmers Air Breathing Apparatus and dive in Horsea lake, including night dives. Historically, the failure rate has been high due to the physical and psychological pressures of military diving, so there is a three-day Pre Entry Diving Acquaint (PEDA), which allows prospective candidates to undergo physical and mental tests to give them a better idea of what to expect of the training.[citation needed]

The diving branch is formed of teams, that serve aboard mine hunters, perform domestic bomb, mine and IED disposal and the two Fleet Diving Groups (FDG).

  • Expeditionary Diving Group (EDG) comes under 3 Commando Brigade specialising in Very Shallow Water (VSW) beach reconnaissance operations, working alongside UK Special Forces (UKSF). New members are trained in parachuting, maritime counter-terrorism (MCT) tactics and swimmer delivery vehicle (SDV) operations.[16]
  • Tactical Diving Group (TDG) is the deep-water warfare unit who specialise in sea mine disposal. Members cross-train with EDG.

Clearance divers have been involved in every major British conflict since their inception and have most recently deployed teams to Iraq, Afghanistan and Libya. They have units operating in the Persian Gulf and Indian Ocean providing an underwater force protection (UWFP) element. See Operation Kipion.[citation needed]

From 2022 Royal Navy Divers will come under the Diving & Threat Exploitation Group (DTXG) based in Portsmouth, Plymouth and Faslane. It comprises:

  • A Squadron (formerly Tactical Diving Group) Special operations squadron - Horsea Island, Portsmouth.
  • B Squadron (formerly Southern Diving Group) Homeland Defence in support of Op Tapestry and IWMAR diving to SURFLOT, geographically distributed between Horsea Island, Portsmouth and HMNB Devonport
  • C Squadron (formerly Northern Diving Group) Homeland Defence in support of Op Tapestry and IWMAR diving to SUBFLOT, located in HMNB Clyde.
  • D Squadron (formerly Expeditionary Diving Group) MTG, LRG / JEF(M) facing, located at Horsea Island, Portsmouth.
  • E Squadron (Explosive exploitation) Horsea Island, Portsmouth, with options to disperse force elements to HMNB Clyde and Devonport.[17][18]

North America

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Oceania

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See also

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References

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  1. ^ "The Clearance Diver | RN Clearance Divers Association". 20 November 2014. Retrieved 5 December 2024.
  2. ^ "Navy EOD - Diver Training". www.military.com. Retrieved 27 December 2021.
  3. ^ "Clearance Diving Officer (CDO)". www.royalnavy.mod.uk. Retrieved 5 December 2024.
  4. ^ "Mine Clearance Diver". Royal Navy.
  5. ^ "Estonian Navy - mine countermeasures section". 30 May 2023.
  6. ^ "Plongeurs-démineurs, l'élite des grands fonds". Le Monde.fr. 11 December 2016.
  7. ^ "Castelsarrasin. Phase de tests pour entrer parmi l'élite des plongeurs de combats du génie".
  8. ^ "Prepare the way: German Navy mine divers". 8 August 2018.
  9. ^ "Irish Defence Forces – Naval Service Diving Section (NSDS)".
  10. ^ "Norway's Naval divers and Clearance Diver force".
  11. ^ "Diving division in Skredsvik, Sweden, Sailors & Officers trained as Naval divers".
  12. ^ "The RN Clearance Diving Branch".
  13. ^ pp 16-20, issue 41, Historical Diving Times.ISSN 1368-0390
  14. ^ Quick, D. (1970). "A History Of Closed Circuit Oxygen Underwater Breathing Apparatus". Royal Australian Navy, School of Underwater Medicine. RANSUM-1-70. Archived from the original on 9 May 2008. Retrieved 20 March 2009.{{cite journal}}: CS1 maint: unfit URL (link)
  15. ^ Goble, Steve (2003). "Rebreathers". South Pacific Underwater Medicine Society Journal. 33 (2): 98–102. Archived from the original on 8 August 2009. Retrieved 20 March 2009.{{cite journal}}: CS1 maint: unfit URL (link)
  16. ^ Elite UK Forces - Fleet Diving Units
  17. ^ "Royal Navy divers transform to create new elite mission teams".
  18. ^ "MCDOA Latest News".
  19. ^ Australian clearance divers tasks include rendering and safe disposal of conventional ordnance and improvised explosive devices.
  20. ^ Rudolph, Jack; Sweeney, Taff. "Navy Clearance Diver". adas.org.au. Australian Diver Accreditation Scheme. Retrieved 27 December 2021.
  21. ^ New Zealand Navy Divers