Exam Question

The reliable operation of a ship's steering gear is paramount for vessel safety, navigation, and pollution prevention. Consequently, international regulations, primarily **SOLAS Chapter II-1, Regulation 29**, mandate a high degree of redundancy and built-in measures to ensure the steering gear remains operational even in the event of failures such as breakages, pipe failures, or motor burnout. As a Senior MEO Class 1 Examiner, a comprehensive understanding of these measures is crucial.
Here are the built-in measures by which the steering gear mechanism can be kept operational:
1. **Redundant Main Steering Gear Power Units (Motors and Pumps):**
* **Description:** For most vessels, especially those of **10,000 gross tonnage (GT) and upwards**, the main steering gear is equipped with at least two identical and independent power units, each comprising an electric motor driving a hydraulic pump. For ships between 500 GT and 10,000 GT, the main steering gear must have at least two power units if a single power unit is insufficient to meet the performance criteria, or if the main steering gear itself comprises two independent and separate steering gears. Below 500 GT, requirements are less stringent but often still involve redundancy.