Navy commanders slash reporting times to track foreign submarines
By Miriam Adler ·
Personnel posed as scientists to mask Soviet submarine tracking, a secret the Navy later modernized into a centralized network to eliminate reporting delays for the fleet.
The metric for success was "minimum time-late." In the sterile language of the Navy’s surveillance apparatus, this is the only failure that matters: the gap between a sensor detecting a contact and a commander knowing about it. A mirrored program description from the Federation of American Scientists (FAS) details the Surveillance Direction System (SDS), a command, control, and communications effort intended to close that gap by fusing disparate data streams into a single, streamlined picture.
The SDS was not a new sensor, but a digital glue. Its purpose was to provide the means for the Fixed Distributed System (FDS), the Sound Surveillance System (SOSUS), and the Surveillance Towed Array Sensor System (SURTASS) to manage and report contacts with maximum efficiency. By replacing what the FAS mirror describes as "obsolescent components," the Navy sought to reduce the high costs of supporting aging hardware while consolidating the number of processing sites. The result was a system-wide consolidation where remaining sites were converted to SDS/SSIPS—the Shore Signal and Information Processing Segment.
"Minimum Time-Late"
Efficiency is often the primary driver of surveillance expansion. The SDS was designed to create a "comprehensive maritime surveillance picture," a phrase that suggests a god-eye view of the ocean floor. To achieve this, the system integrated the fixed bottom arrays of SOSUS with the mobile capabilities of SURTASS. The FAS description notes that the SDS provides a "reliable and mobile tactical communications system," specifically intended to slash reporting times.
This drive for speed reflects a cold administrative logic. The document emphasizes that the SDS would "significantly lower life cycle costs," treating the tracking of foreign submarines as a budgetary problem to be optimized. The reduction in processing sites suggests a shift toward centralization, where fewer human operators managed more data, facilitated by software that could fuse sensors in a way that human analysts alone could not. The system was not merely an upgrade; it was an integration into the Navy's Space and Electronic Warfare Architecture, using conventional fleet circuits to ensure the data reached the fleet without delay.
Project Caesar
To understand the SDS, one must understand the ghosts it was meant to modernize. Public records establish that the Sound Surveillance System, or SOSUS, began its life under a thick layer of deception known as Project Caesar. For years, the very name SOSUS was classified. The shore stations, known as Naval Facilities (NAVFAC), were presented to the world as sites for harmless oceanographic research. The personnel worked under the guise of scientists, hiding a mission of passive sonar detection designed to track Soviet submarines during the Cold War.
By the time the SDS was being implemented in the late 1990s, the mission had been officially declassified—the transition to the Integrated Undersea Surveillance System (IUSS) had occurred in 1985, and the "oceanographic" cover story had been dropped in 1991. However, the FAS mirror shows that the infrastructure of that secrecy remained. The SDS was tasked with managing the legacy of Project Caesar, turning the static, hidden arrays of the Cold War into a dynamic, fused network of "sensor fusion and communications developments."
JMCIS and the Fleet Gateway
The final stage of this data pipeline was the Joint Maritime Command Information System (JMCIS). According to the FAS program description, JMCIS served as the "IUSS gateway to the fleet." If the SDS was the brain that fused the data, JMCIS was the mouth that spoke to the ships. The document notes that JMCIS was being upgraded specifically to "better report acoustic data," ensuring that the fusion provided by the SDS didn't bottle-neck at the point of delivery.
This integration ensured that the Navy's reach extended from the fixed sensors on the seabed to the mobile arrays towed behind ships, all feeding into a centralized architecture. The SDS was a specified requirement for both the FDS and the Advanced Deployable System (ADS), suggesting a continuous loop of requirement and deployment designed to ensure that no acoustic signature went unreported.
While other archives, such as the US National Archives' Research and Development Files or the Naval Tactical Data System project files, may contain the granular technical specifications of these arrays, the FAS mirror captures the strategic intent: a push for a seamless, cost-effective, and rapid reporting loop. The record leaves the specific capabilities of the "Advanced Deployable System" largely undefined, noting only that SDS was a requirement for its sensor fusion. It ends with the observation that JMCIS was being upgraded to better report acoustic data.