Books of Reference (BRs) provide technical information for Royal Navy equipment required by planning staff, unit users/operators and technicians involved with operational use, maintenance or repair of the equipment.
The information contained within BRs is divided into a standard set of categories which detail what information is contained within each category:
Category 1 – Purpose and Planning Information
This category contains all the information required to manage the equipment and is split into sub categories as follows:
Sub-category 1A – Summary of Data and List of References
The information contains equipment name and purpose, a description of the equipment, weight and dimensions, NATO Stock Number and Part Number information, and a list of associated references and related publications.
Sub-category 1B – Performance and Limitations
Describes the performance and limitations of the equipment the operational capability and that of any related software.
Sub-category 1C – Upkeep Policy
Upkeep policy information which details the actions which must be carried out to plan the upkeep of the equipment.
Category 2 – Operating Information
This category contains instructions for the operator in order to use the equipment correctly and safely.
The following information is contained within this category:
– Operational limitations.
– General description.
– Operating instructions.
– Operator checks.
– Diagnostic and repair information.
– Supplementary information.
Category 2 can be sub-divided into 2A, 2B, 2C, 2D and 2E dependent on the level of content and the type of equipment.
Category 3 – Technical Description
Contains the technical principles of design, operation, function and interrelation of the various parts of the equipment. Physical construction is also included when necessary. This category may be used for study and reference purposes. For repair purposes, it may be used with Category 5, described later, to assist in fault diagnosis.
Sub-category 3A – System Description
Includes positions and locations of equipment and assemblies and a complete functional description in a logical sequence.
Sub-category 3B – Equipment Description
Contains constructional details of the positions and locations of assemblies and sub-assemblies and types of enclosure. The functional description of the equipment gives details of equipment interfaces and functional diagrams.
Sub-category 3C – Program Description
Contains details of the system software to cover the functions identified in Cat 3A and or 3B.
Category 4 – Installation Instructions
This category contains the required information to install the equipment.
Category 5 – Maintenance Information and instructions
This category is primarily used if technician level maintenance is required for the equipment.
Included in this category is failure diagnosis which is used to diagnose the fault from which the technician can then refer to the repair instructions which detail the remedial action to be taken.
Other categories that may be included are inspection standards which detail how a measured inspection of the equipment can be carried out and calibration standards which show trained technicians how to correctly calibrate equipment at the required intervals.
Category 6 – Scheduled Maintenance
All scheduled information is contained within this category including all the periodic maintenance required for the equipment.
This information is normally based on a time period but may also contain schedules relating to other periods such as mileage, hours run or rounds fired.
Category 7 – Parts Catalogues and Complete Equipment Schedules
This category contains all the information relating to spares for the equipment contained within an Illustrated Parts Catalogue (IPC) which is used for ordering spares and also in conjunction with Category 5 when repairing the equipment.
Category 8 – Modification and General Instructions
This category contains all the information relating to any changes that have been made to the equipment in service either by the manufacturer or the MoD. These changes including instructions on how to modify the equipment are contained within these documents.
The main purpose of the document is to store the information relating to the changes which is then subsumed into the main documentation when it is up issued.
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