Exam Question
Sketch and describe a "fail safe steering gear" suitable for use on a tanker of more thar 100,000 T DWT. Explain the sequence of events that take place when an oil leak takes place in one of the hydraulic pipelines
Class 2 (2nd Engineer)
MEKG
📅 Aug 2023
Reference Answer
### **Introduction and Regulatory Compliance (SOLAS)**
For a tanker exceeding 100,000 T DWT, the steering gear installation must comply with the stringent requirements of SOLAS Chapter II-1, Regulation 29. The key mandates influencing the design are:
1. **Redundancy**: The main steering gear must comprise two or more identical power actuating systems. An electro-hydraulic system must be served by at least two independent circuits.
2. **Performance**: The system must be capable of putting the rudder from 35° on one side to 35° on the other side at maximum service speed and deepest draught. It must also move the rudder from 35° on one side to 30° on the other side in not more than 28 seconds.
For a tanker exceeding 100,000 T DWT, the steering gear installation must comply with the stringent requirements of SOLAS Chapter II-1, Regulation 29. The key mandates influencing the design are:
1. **Redundancy**: The main steering gear must comprise two or more identical power actuating systems. An electro-hydraulic system must be served by at least two independent circuits.
2. **Performance**: The system must be capable of putting the rudder from 35° on one side to 35° on the other side at maximum service speed and deepest draught. It must also move the rudder from 35° on one side to 30° on the other side in not more than 28 seconds.
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