What is the name of the navigation sensor system interface system?

The correct answer is the navigation sensor system interface system, which is known as SSDS (Ship Self-Defense System). SSDS integrates various sensors and systems to enhance the ship's situational awareness and defense capabilities.

This system is crucial in modern naval operations as it allows for the seamless integration of various navigational and targeting data sources, enabling commanders to make informed decisions. It serves as the backbone for the sensor-to-shooter process onboard.

In contrast, the other options refer to specific systems that do not function primarily as navigation sensor system interfaces. For example, SPQ-9B is a radar system primarily used for surveillance and target tracking, while SSN-6 refers to a type of submarine-launched missile system. NSSMS, or NATO Seasparrow Surface Missile System, is focused on airborne missile defense and not on navigation sensor integration. Each of these systems has its unique functions but does not encompass the wider scope of sensor integration that SSDS provides.