Section 5 Control and monitoring
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 4 Propulsion Devices - Chapter 2 Water Jet Systems - Section 5 Control and monitoring

Section 5 Control and monitoring

Parent topic: Chapter 2 Water Jet Systems

5.1 General

5.1.1 In addition to this Section, the control engineering systems are to comply with Vol 2, Pt 9, Ch 7 Control, Alerts and Safety 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 Vol 2, Pt 6, Ch 1 Steering Gear, alarms and monitoring requirements are indicated in Vol 2, Pt 4, Ch 2, 5.2 Monitoring and alarms 5.2.2 and Table 2.5.1 Alarms.

Table 2.5.1 Alarms

Item Alarm Note
Hydraulic system pressure Low —
Hydraulic oil supply tank level Low —
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

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 Vol 2, Pt 9, Ch 7 Control, Alerts and Safety Systems.

Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.