Section 6 Control and monitoring
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 11 Transmission Systems - Chapter 1 Gearing - Section 6 Control and monitoring

Section 6 Control and monitoring

Parent topic: Chapter 1 Gearing

6.1 General

6.1.1 Control engineering systems are to be in accordance with Pt 16 Control and Electrical Engineering.

6.1.2 All main and auxiliary gear units, intended for essential services, are to be provided with means of indicating the lubricating oil supply pressure. Audible and visual alarms are to be fitted to give warning of an appreciable reduction in pressure of the lubricating oil supply. These alarms are to be actuated from the outlet side of any restrictions, such as filters, coolers, etc.

6.2 Unattended machinery

6.2.1 Where the machinery is fitted with automatic or remote controls so that under normal operating conditions it does not require any manual intervention by the operators, gear units are to be provided with the alarms and safety arrangements required by Pt 11, Ch 1, 6.2 Unattended machinery 6.2.2 and Table 1.6.1 Alarms and safeguards. The sensors and circuits utilised for the second stage alarm and automatic shut down in Table 1.6.1 Alarms and safeguards are to be independent of those required for the first stage alarm.

Table 1.6.1 Alarms and safeguards

Item Alarm Note
Lubricating oil sump level Low  
Lubricating oil inlet pressure* 1st Stage Low  
  2nd Stage Low Automatic shutdown of engine
Lubricating oil inlet temperature* High
Thrust bearing temperature* High  

Note For transmitted powers of 1500 kW or less, only the items marked * are required.

6.2.2 Where the gear unit is required to be provided with a standby pump, the standby pump is to start automatically if the discharge pressure from the working pump falls below a predetermined value.

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