Experience
Case studies
Find out how Odin Diving has delivered underwater work for maritime and offshore challenges.
Boat rental for archeological project
Challenge
One of Odin Diving A/S´ boats with crew and diving equipment was hired by an American university who on behalf of the US Government are searching for airplanes and airmen lost in World War 2.
Solution
The boat and crew, together with diving compressor and dive equipment was mobilized to the port closest to the search area. Side-scan and magnetometer survey was performed in a 1 km2 area by a third-party surveying company. Multiple dives were conducted over 2 weeks at depths of 20 meters. The site was photomapped and multiple objects were investigated for identification of serial numbers.
Outcome
It was established that the airplane wreck was an American bomber lost in WW2. Further excavation will be required in the future.
All diving was conducted timely and safely.
Removal of heavy fuel oil from vessel in port
Challenge
Odin Diving A/S was hired to remove 400 sqm of oil residue on the stern area of a vessel after a heavy fuel oil transfer hose had broken. The environmental requirements of the port dictated that all oil residue had to be recovered.
Solution
A team was assembled, together with a steam recovery system which lived up to the environmental requirements of the port authorities.
Outcome
All oil was removed, and all oil residue was disposed of at an approved oil sludge recycling facility.
Environmentally compliant methods ensured safe oil removal.
Recovery system met port authority regulations.
Oil deposits were disposed of at certified recycling facilities.
Helideck recovery after collision
Challenge
A collision between a jack-up, a platform, and an FPSO resulted in a broken-off 200-ton helideck. Odin Diving A/S was appointed for the subsea work to safely recover the helideck to the surface.
Solution
Initial inspection with ROV was conducted for planning purposes. A 5-man dive team then cut 4 windows in the aluminum sandwich construction to install 4 sets of 60-ton lifting chains.
Outcome
After the installation of lifting chains was completed, the helideck was brought safely to shore by a 400-ton lifting barge.
Effective planning minimized risk during subsea recovery.
Precision cutting enabled safe attachment of lifting chains.
The retrieval of the 200-ton helideck ensured a successful outcome.
MPI and visual inspection at Femern Belt construction site
Challenge
Odin Diving A/S was appointed to perform third-party inspections of more than 300 meters of underwater weld seams at a Femern Belt facility.
Solution
A team of 1 diver supervisor and 3 diver technicians were mobilized for the job. All were certified underwater inspection technicians, certified as either CSWIP 3.2U or Lloyds NDT Inspector.
All weld seams were initially cleaned by HP water jetting. Close Visual Inspection (CVI) was then performed on all weld seams. Finally, 5% of the inspected length of weld seams was tested by Magnetic Particle Inspection (MPI).
Outcome
The inspection ensured that all weld seams met strict project quality requirements.
High-pressure water jetting ensured clean and accurate inspections.
Certified divers delivered reliable Magnetic Particle Inspection (MPI).
300+ meters of weld seams inspected with precision and adherence to Class.
UWILD on jack-up rig
Challenge
Odin Diving A/S performed UWILD on a jack-up rig in December 2021. The scope of work was visual inspection and NDT of chord and cross brace to spudcan connections. New anodes were also to be fitted at the lower bays.
Solution
Upon initial inspection, it was observed that each spudcan top was covered in 3.5 to 4 meters of very hard clay. Approximately 1,000 cubic meters of clay was removed before visual inspection and Eddy-Current testing could be performed by the NDT-certified divers (CSWIP 3.2U) under the supervision of DNV.
Outcome
60 anodes were cut off the existing brackets and new anodes welded on by approved wet welders.
Advanced removal of 1000 cubic meters of clay ensured thorough inspection.
New anodes installed by certified wet welders for improved corrosion protection.
Compliance with DNV standards ensured operational readiness.
Propeller blade straightening on 55-meter superyacht
Challenge
A 55 meter superyacht in Thailand had collided with rocks, resulting in severe vibrations from the propeller and loss of performance on its port propeller.
Solution
Odin Diving A/S mobilized a team of 4 divers/technicians, who upon arrival made an initial inspection to determine the condition of the propeller. It was found that 3 out of 4 blades on the 2.6 meter port propeller were bent. The starboard propeller was undamaged.
The 3 bent blades were straightened back to its original shape and the propeller was polished to further reduce any vibration or lack of performance.
Outcome
The procedure was witnessed by the Class surveyor, who approved the result based on measurements and video documentation. A sea trial showed that there was no lack of performance anymore and vibration was not noticeable. Time from client´s confirmation to completed job, including sea trial, was 71 hours.
Immediate mobilization ensured rapid restoration of propeller performance.
Precise blade straightening restored the vessel’s propulsion efficiency.
Class-approved results minimized downtime and ensured compliance.
Underwater propeller blade repair in less than 24 hours
Challenge
Odin Diving A/S performs underwater propeller blade repair in less than 24 hours.
A 180-meter bulk carrier in laden condition en route from the Baltic Sea to SE Asia encountered vibration and greatly reduced performance after sailing in an area of severe ice conditions.
Solution
Upon inspection, the cause was found to be 3 out of 4 blades on the main propeller, which were all bent due to ice impact.
As the vessel was in laden condition, repair works had to be performed underwater.
Odin Diving A/S mobilized a team of experienced diver technicians to cold straighten the damaged blades back to their original shape.
Outcome
After 10 hours of diving, the 3 damaged blades on the propeller were straightened back to their original shape. All work was done to the full satisfaction of the attending surveyor.
The vessel was able to continue its voyage in less than 24 hours after arriving in port.
Subsequent sailing tests showed no vibration or loss of original performance.
Repair completed within 24 hours, enabling swift resumption of voyage.
Experienced technicians ensured high-precision blade straightening.
Reduced vibration and restored performance to original condition.
NDT on jack-up rig
Challenge
As Odin Diving A/S have several divers with a level 2 underwater NDT certificate (CSWIP 3.2U), we were asked by a client to perform eddy-current NDT inspection and close visual inspection on spudcan to Chord and braze connections on all 3 legs, under the supervision of Lloyds Register.
Solution
As the jack-up was sitting high and dry on a heavy lift vessel, our divers for once did not have to get wet.
Outcome
All connections on all 3 legs were cleaned and inspected within 60 hours to the satisfaction of the client and Class.
Certified divers conducted thorough inspections to Class standards.
Rapid execution completed the inspection within 60 hours.
Avoided downtime by delivering results without disrupting operations.
Contact Odin Diving A/S
Reach out to us for inquiries, project collaborations, or to learn more about how our expertise can support your operations.
Send us an email with your questions or project details, and we’ll get back to you promptly.
PIER 6-4, 9900 Frederikshavn
Visit us at our headquarters or find us at the dock in Frederikshavn.