MIL-HDBK-2051(SH)
5. DESIGN PROCESS
5.1 Design process . The design process outlined in 4.3 is tailored to the ship design process and schedule. The FOCT design is based on information
from the ship specifications and on detailed ship configuration information. At the end of each phase of the design process, the FOCT design should be placed under configuration control and then integrated into the total ship design package. The FOCT design should be done in conjunction with the ship design so that modifications to the ship contract to incorporate the FOCT are not required.
5.1.1 FOCT design development . The following sections identify the information that is required at each phase in the development of the FOCT design. The requirements from the ship and system specifications are combined with FOCT design guidance to develop the optimal configuration of the FOCT for the specific platform on which it is to be installed.
5.2 Conceptual design . The first phase in developing a FOCT is the conceptual design. Ship and system specifications and ship configuration drawings are reviewed to determine ship and system configurations and requirements. From these requirements the initial FOCT configuration is developed. This initial design shows the location and the approximate number of interconnection boxes as well as identifying interconnecting trunks between interconnection boxes.
5.2.1 Conceptual design process . In order to optimize the FOCT configuration, information on the end user equipment that will interface to the cable plant is analyzed to develop the following items:
a. Service area definitions
b. Trunks required between interconnection boxes
5.2.1.1 Service area definition . A service area is a set of compartments that are grouped together to share the same interconnection box. Service
areas are determined by identifying all compartments on the ship that require access to the FOCT and then grouping the compartments together based on location and the number of systems using the FOCT within a local area. The interconnection boxes are then preliminarily located within the service areas. If possible, a service area should contain compartments from no more than one or two watertight zones within the ship.
5.2.1.2 Trunks between interconnection boxes . Once service areas are defined and preliminary interconnection box locations are chosen, the interconnection requirements between interconnection boxes are identified. For the conceptual design it is sufficient to identify a requirement for an
interconnection without specifying the total number of fibers required in that interconnection.
5.2.1.2.1 Interconnection requirements . The interconnection requirements are determined from the system specifications, system drawings, and ship configuration drawings. The system specification or system drawings should identify the interconnection requirements between system equipments while the ship configuration drawings should identify the location of those equipments. This information is used to identify the trunks required between
interconnection boxes. Local cables are routed from the system equipment to the interconnection box in that equipment's service area. The total interconnection requirements between equipments determines the trunks required between interconnection boxes.
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