Showing 93 results for Maritime
DARPA's Oceans of Things program seeks to enable persistent maritime
situational awareness over large ocean areas by deploying thousands of
small, low-cost floats that could form a distributed sensor network. Each
smart float would contain a suite of commercially available sensors to
collect environmental data-such as ocean temperature, sea state, and
location-as well as activity data about commercial vessels, aircraft, and
even maritime mammals moving through the area. The floats would transmit
data periodically via satellite to a cloud network for storage and real-time
The Persistent Aquatic Living Sensors (PALS) program aims to leverage biology to augment the Department of Defense’s existing, hardware-based maritime monitoring capabilities. The program will tap into marine organisms’ innate abilities to sense and respond to perturbations in their environments and apply those abilities to the detection, characterization, and reporting of manned or unmanned underwater vehicles ranging from small autonomous vessels to large nuclear submarines.
The Global Positioning System (GPS) is the predominant means of obtaining
positioning, navigation, and timing (PNT) information for both military and
civilian systems and applications. However, the radio frequency basis for
GPS also means that its signals cannot penetrate seawater, and thus undersea
GPS is effectively denied. The Positioning System for Deep Ocean Navigation
(POSYDON) program aims to develop an undersea system that provides
omnipresent, robust positioning across ocean basins.
Military platforms and structures, such as vehicles, ships, aircraft and buildings, must withstand transient shock, vibrations and other structural loads in a variety of demanding operational environments. These frequent and varying transient loads are often transmitted to occupants, which can degrade warfighters’ performance by creating discomfort and injuries. In addition, varying loads can lead to shortened service life for the military platforms, as well as the equipment inside. Currently, structures designed to achieve high stiffness for static loads (dead weight) typically can’t adapt to or dampen dynamic loads well. Conversely, structures designed for high damping do not carry conventional loads as efficiently.
The Tactical Undersea Network Architectures (TUNA) program seeks to develop and demonstrate novel optical-fiber-based technology options and designs to temporarily restore tactical data network connectivity in a contested environment. TUNA is currently in an initial phase that emphasizes concept and technology development in three technical areas: system design, small fiber optic cable systems, and buoy nodes.