Kongsberg Stabilisation At Rest (SAR) Ice Class
The Kongsberg Stabilisation At Rest (SAR) Ice Class is a shaft line and propulsion system that integrates vibration‑damping technology for propeller shafts on ice‑class vessels, reducing noise and wear while the ship is stationary.
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Common issues
- Mounting/bracket wear in the stabilization unit from ice-load vibration and shock
- Degradation of the damping element (elastomeric or hydraulic, per design) over time
- Sensor or monitoring drift affecting control response, where the unit is instrumented
- Corrosion at shaft line interfaces exposed to the machinery space environment
- Alignment drift between the shaft line and the damping unit following ice impact loads
Inspection checklist
- Check mounting bolts/brackets for tightness and corrosion
- Inspect the damping element for visible degradation
- Verify control/monitoring system function, where the unit is instrumented
- Check shaft line alignment periodically, particularly after any reported ice impact event
- Check for oil leakage if the unit is hydraulically damped
Service intervals
| Visual/functional inspection | per the maker's schedule, commonly annually - confirm against Kongsberg's own maintenance manual for this unit |
Critical spares
- Mounting/isolation elements per the maker's specification
- Seal kit, if hydraulically damped
- Instrumentation cable/connector kit, where the unit is monitored
Safety
- Shaft line rotating machinery guards must be in place before inspection
- After heavy ice contact, inspect for damage before returning the unit to service
- Relieve any stored hydraulic pressure before opening the unit, where hydraulically damped
- Confirm the unit does not obstruct emergency access along the shaft tunnel
Class survey
Shaft line vibration/stabilization equipment on ice-class vessels is generally checked as part of the propulsion/shaft line survey scope, particularly after reported ice impact events. Detailed service data specific to this Kongsberg unit was not independently available here and should be confirmed against the maker's own technical manual.
Components & Design
Component data being added…
Technical Data
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