IMCA Safety Flash 13-22
IMCA has published Safety Flash 13-22.
Click to download the IMCA Safety Flash 13-22 here.
Surface decompression near-miss
During surface decompression, following a SURDO2 42msw/40min dive, the depth of the chamber was unintentionally decreased from 12msw to 5msw forty minutes into the decompression. Immediately after this was discovered, Treatment Table 5 was initiated. The divers did not present any symptoms before, during or after the incident.
Near miss: grinder disc rotation set up in the wrong direction
In preparation for a forthcoming dive, a GR29 underwater grinder was requested to be set up by the topside technician to be used for left-handed cutting to assist in gaining access to the cut. The diver, on receiving the left handed grinder, carried out pre-operational equipment checks, where it was identified that the disc rotation was found to be in the wrong direction. The operations were stopped.
USCG: Exceeding electrical duty rating can lead to failure
There was a failure during the routine maintenance and recovery of a rescue boat, where the electrical motor contactor for the winch motor failed in an energized position (i.e. motor in an “on” or “hoist” condition). This failure occurred when the contactors fused together due to exceeded duty rating.
Searchlight fell from vessel during heavy weather
The starboard wing searchlight became detached from its mounting bracket in heavy weather, and fell directly into the sea, snapping the secondary tether that was in place. The secondary tether was jury rigged out of a whip-check designed to contain a parting airline; it was not designed to take any loads.
MSF: Corrosion in fire-fighting equipment
The Marine Safety Forum (MSF) has published Safety Alert 22-09 relating to observations involving the CO2 firefighting system onboard a vessel. Significant corrosion was found during routine monthly inspection of the fixed CO2 system. This resulted in it not being possible to insert the safety pin to isolate the cylinder during any maintenance.
