Turkish company Havelsan equips naval forces with PDDS and SDDS systems for real time data distribution.

The Turkish company Havelsan has recently developed two integrated data distribution systems for naval platforms: the Platform Data Distribution System (PDDS) and the Submarine Data Distribution System (SDDS). These systems are currently in use by the Turkish Naval Forces and by allied navies in operational environments. Their purpose is to meet the data processing and distribution requirements of modern surface and underwater platforms.
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Havelsan's Platform Data Distribution System (PDDS) and Submarine Data Distribution System (SDDS) are currently in use by the Turkish Naval Forces and by allied navies. (Picture source: Havelsan)

The Platform Data Distribution System (PDDS) is designed for surface vessels. It collects, processes, and distributes data from platform sensors and systems to mission computers, Combat Management Systems (CMS), weapon systems, tactical sensors, and other subsystems. It provides synchronized data flow across all these components during operations. The PDDS is available in four configuration types: a two 25U cabinets configuration used for large surface platforms such as frigates and corvettes; a single 25U cabinet configuration suitable for patrol vessels and missile boats; a 12U cabinet configuration for fast attack crafts and smaller platforms; and a compact PDDS unit designed for unmanned surface platforms (USVs) and similar platforms.

The Submarine Data Distribution System (SDDS) is developed specifically for submarine platforms. It manages real-time, reliable, and synchronized data flow between critical submarine subsystems, including tactical sensors (sonar, radar, periscopes), navigation systems, combat management systems, and weapon systems. The SDDS includes redundant computing infrastructure, with options for either two cabinets or redundancy built into a single cabinet. This architecture provides fault tolerance and supports continuous operation in case of component failure.

Both systems support low-latency data transfer across critical systems and offer multiple interface options. These interfaces include Ethernet, RS-422, RS232/485, HDLC, Synchro, NTP, and STANAG HQ/1PPS. Intelligent data control, filtering, and prioritization algorithms are applied to ensure accurate and ordered data distribution. Simulation and black box functions are also integrated into both systems. These functions include sensor data simulation, data recording, and post-operation analysis.

Typical input interfaces for PDDS and SDDS include Inertial Navigation Systems (INS), gyroscopes, Global Navigation Satellite Systems (GNSS), electromagnetic log (EM-Log), Doppler log, echo sounders, RADAR, periscopes, meteorological sensors, and main engine and auxiliary systems. Output interfaces include Combat Management Systems, weapon and missile control systems, RADAR and periscope systems, electro-optical sensor systems, navigation and chart systems such as ECDIS and WECDIS, and communication and tactical data link systems including LINK and AIS.

The systems conform to multiple military standards. These include MIL-STD-810 (environmental engineering considerations and laboratory tests), MIL-STD-461 (electromagnetic interference characteristics), MIL-STD-1310, and MIL-STD-1399 (interface standards for shipboard systems). PDDS and SDDS are designed with modular and scalable hardware and software architecture, allowing for adaptation to various classes of naval vessels.