NDSC-25MW21 Slewing davit for life rafts and rescue boats

The Norsafe NDSC-25MW21 slewing davit is specifically designed for safe and efficient launch and retrieval of fast rescue boats and life rafts. It is intended for long term, reliable operation in harsh and hazardous marine and offshore environments. The davit system is designed in accordance with latest Solas and IMO requirements.

The davit consists of a mechanical slewing jib and an electric driven winch with single wire fall. Slewing and dead ship slewing functions are driven by a small hydraulic power pack. The hydraulic system is equipped with a stored power unit - which allows full operation of the davit in “dead ship” conditions.

The system provides:

  • Hoisting of the loaded rescue boat by electric motor
  • Gravity lowering of the loaded rescue boat independent of external power supply
  • Dead ship slewing of the rescue boat by the nitrogen accumulator installed on the davit arm
  • Retrieval of the rescue boat by manual hoisting
  • Manual slewing by hand-pump.
Structural steel Q345 or equivalent
Outfitting steel : Q235 or equivalent
Paint system : Sandblasted to Sa 2.5, painted with 1 x 50µ DFT Zink Epoxy Primer.
Optional painting according to customer requirement
Max lifting / lowering : SWL 21.0 kN at 4m working radius. Adjusted to actual boat weight.
Lifting speed : 0 - 18.0 m/min
Dead Ship lowering speed : 50 - 60 m/min
Maximum operational list and trim : ±20° / ±20°
Operational temperature range : -20°C to +50°C

Winch data
Winch : Hydraulic driven. SOLAS Approved

Power consumption
Total power consumption max load  : TBA
Power supply : 380V to 420V and 690V / 3Ph / 50Hz 
440V to 480V and 690V / 3Ph / 60Hz
Heating element : 220V in motor

Hydraulic piping and fittings
System type piping and fittings : DIN2353, (ISO8434-1)
Materials : Pipes, AISI 316 stainless steel
Fittings and hose couplings : Chromated steel
AISI 316 stainless steel on request

Typical specification - subject to revision according to customer requirement. 
All products are subject to continuous review. Norsafe as reserves the right to change specification without prior notice.