Type 50 DKS+ S30, 50-person self-righting SOLAS A or SOLAS B inflatable liferaft approved for extended service intervals in accordance with SOLAS regulation III/20.8.3.

Common issues

• Loss of buoyancy/pressure from slow leaks in the inflatable chambers, often at seams or valve connections
• Painter line or hydrostatic release unit (HRU) deterioration affecting automatic release and inflation
• CO2/N2 inflation cylinder corrosion or under-charge reducing inflation reliability
• Canopy fabric UV degradation and abrasion from cradle/stowage contact
• Servicing interval lapses leading to expired survival equipment or an overdue repack
• Container/cradle corrosion affecting free-float launch in an emergency

Inspection checklist

• Visual check of the liferaft container, cradle, and lashings for corrosion and secure stowage
• Check the hydrostatic release unit expiry date and correct installation/orientation
• Verify the painter is correctly secured to a strong point, not left coiled incorrectly
• Confirm the service due date/annual service sticker is current
• Check that stowage allows free-float release within the required time
• Inspect for physical damage to the container that could impede automatic opening
• Verify the davit/launching arrangement, if davit-launched, operates correctly

Service intervals

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Hydrostatic release unit of the matching approved type
• Painter line and weak link, if part of the release arrangement
• Inflation cylinder (CO2/N2), serviced/recharged only by an approved station
• Container seal/banding for re-stowage after service

Safety

• Never attempt to open, service, or recharge the liferaft container onboard - this is an approved-service-station-only task
• Incorrect painter attachment can prevent inflation or cause the raft to be lost with a sinking vessel
• An expired hydrostatic release unit is a critical safety failure - check the date at every inspection
• Confirm the item is correctly identified as an inflatable liferaft rather than a lifeboat for correct emergency response planning and crew drills

Class survey

Note on data quality: the order data lists this item's type as 'Freefall Lifeboat', but the product description, source record ('INFLATABLE LIFERAFT (SOLAS)'), and model reference indicate this is actually a SOLAS inflatable liferaft (davit- or throw-overboard-launched, self-righting, 50-person capacity), not a rigid freefall lifeboat - the catalogue type/category field appears to be a data error and should be corrected separately. This content addresses the liferaft as the actual product. Class and PSC will check the current service certificate, HRU expiry, and stowage/lashing arrangement at each survey.

Estimated lifetime: Not meaningfully expressed in running hours; inflatable liferafts of this type are typically certified for around 12-17 years of service life before mandatory retirement, subject to consistently passing annual/periodic servicing.