Section 4 Unattended machinery space(s) – UMS notation

4.1.1 The general requirements for unattended machinery space(s) are given in Pt 6, Ch 1, 4.1 General of the Rules for Ships, which are to be complied with. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

4.1.2 The requirements of this Section apply to all types of thrusters incorporated in the propulsion or positioning systems of the unit.

4.1.3 For this Section where the Rules for Ships refer to ‘bridge’, this is to be understood to apply to workstation(s) for navigation and manoeuvring, the bridge, if fitted or otherwise a continuously attended control station, as appropriate for the operating condition of the unit.

4.1.4 For this Section where the Rules for Ships refer to ‘engineering personnel’, this is to be understood to apply to maintenance personnel.

4.2.1 The requirements for the alarm system for machinery are given in Pt 6, Ch 1, 4.2 Alarm system for machinery of the Rules for Ships, which are to be complied with. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

4.2.2 An alarm system which will provide warning of faults in the machinery is to be installed. The system is to satisfy the requirements of Pt 6, Ch 1, 2.3 Alarm systems.

4.3.1 Where propulsion machinery is installed, it is to be provided with a remote control system operable at the workstation(s) for navigation and manoeuvring. The system is to satisfy the requirements of Pt 6, Ch 1, 2.6 Control for main propulsion machinery.

4.4.1 Control station(s) are to be provided in the vicinity of the propulsion machinery and at workstation(s) for navigation and manoeuvring, and are to satisfy the requirements of Pt 6, Ch 1, 2.2 Control stations for machinery and equipment.

4.5.1 An automatic fire detection system is to be fitted to protect all unattended spaces together with an audible and visual alarm system. The system is to satisfy the requirements of Pt 7, Ch 1, 2 Fire and gas alarm indication and control systems.

4.6.1 The requirements for bilge level detection are given in Pt 6, Ch 1, 4.6 Bilge level detectionof the Rules for Ships, which are to be complied with. Additions or amendments to these requirements are given in the following paragraph(s) of this sub-Section.

4.6.2 A minimum of two independent systems of bilge level detection is to be provided in each machinery space that is situated below the water line. In addition each branch bilge as required by Pt 5, Ch 13, 4 Bilge drainage of machinery spaces of the Rules for Ships is to be provided with a level detector.

4.7.1 For units which operate with one generator set in service, arrangements are to be such that a standby generator will automatically start and connect to the switchboard in as short a time as practicable, but in any case within 45 seconds, on loss of the service generator. For units operating with two or more generator sets in service, arrangements are to be such that on loss of one generator the remaining one(s) are to be adequate for continuity of essential services. For the detailed requirements of these arrangements, see Pt 6, Ch 2, 2.2 Number and rating of generators and converting equipment.