These results appear from the annual report from Havtil’s DSYS diving database. The report contains statistics and analyses based on data from 1985 to 2025.
Saturation diving offshore
In 2025, 53,396 man-hours were reported in saturation in respect of diving on the NCS and foreign shelves under Norwegian jurisdiction. This corresponds to 134 MUO DSV days (calendar days with divers in saturation) and represents a reduction in diving activity compared with 2023 and 2024.
A total of one near-miss, two minor personal injuries and four possible ear infections were reported in association with saturation diving in 2025.
Surface-oriented diving
For surface-oriented diving offshore in 2025, 40 MUO vessel days (calendar days with divers mobilised on a vessel) were reported, with 228 man-hours spent in the water.
No incidents were reported from this type of diving on the NCS in 2025.
Diving at onshore facilities
As of 2022, diving activity has also been reported to the diving database for onshore facilities.
One incident was reported in connection with the mooring of a vessel, but this is not considered a diver-related injury and is therefore not included in the DSYS statistics.
Activity levels at onshore facilities were somewhat higher in 2025 than in 2024.
Compared with saturation diving, the activity level for surface-oriented diving offshore is generally low, and it has been so for the past 25 years.
Definitions
Saturation diving: The diver works from a diving bell that transports the diver under pressure from the chamber on the vessel to the subsea worksite. The diver remains under pressure in the chamber on the diving vessel between work periods (bell runs).
Surface-oriented diving: The diver enters the water at the surface, performs the work at the relevant depth (less than 50 metres beneath the sea surface), and returns to the surface. Extra compression/decompression in a chamber at the surface may form part of such dives.