Section 5 Control and monitoring
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 16 Water Jet Systems - Section 5 Control and monitoring

Section 5 Control and monitoring

Parent topic: Chapter 16 Water Jet Systems

5.1 General

5.1.1 In addition to this Section, the control engineering systems are to comply with Pt 6, Ch 1 Control Engineering Systems.

5.1.2 For water jets used as the only means of propulsion and steering, a standby or alternative power source for the actuating device that controls the angular position and/or the reversing angle is to be provided. Automatic start of the standby pump supplying hydraulic power for steering and reversing is to be provided.

5.1.3 Means are to be provided at each control station to stop each water jet.

5.2 Monitoring and alarms

5.2.1 In addition to the requirements of Pt 5, Ch 19 Steering Systems, alarms and monitoring requirements are indicated in Pt 5, Ch 16, 5.2 Monitoring and alarms 5.2.2 to Pt 5, Ch 16, 5.2 Monitoring and alarms 5.2.4 and Table 16.5.1 Alarms.

Table 16.5.1 Alarms

Item Alarm Note
Hydraulic system pressure Low —
Hydraulic oil supply tank level Low —
Hydraulic oil temperature High Where an oil cooler is fitted
Lubricating oil temperature High —
Lubricating oil pressure Low In forced lubrication systems
Lubricating oil tank level Low Where a tank is provided
Ratio of jet rpm/vessel speed High Only if installed power per jet >4 MW
Control system failure Fault Includes follow-up failure of steering or reversing system
Control system power supply Failure —

5.2.2 An indication of the angular position of the nozzle is to be provided at each station from which it is possible to control the direction of thrust from the units.

5.2.3 An indication of both the required and actual reversing bucket position is to be provided at each station from which it is possible to control the reversal of thrust.

5.2.4 All alarms associated with water jet unit faults are to be indicated individually at the control stations and in accordance with the alarm system specified by Pt 6, Ch 1 Control Engineering Systems.

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