Systems and methods are provided for firearm monitoring and remote support of a plurality of connection points within a deployment location, wherein each connection point of the plurality of connection points is configured to receive signals produced at one or more firearms proximate to the connection point within the deployment location, wherein each connection point of the plurality of connection points is further configured to communicate the received signals to a server device located outside of the deployment location, and a server device, wherein the server device runs application software that receives the signals from each of the connection points and uses the sensor information included in the signals to detect a threat within the deployment location.

Systems and methods are provided for a firearm monitoring system comprising an inertial measurement unit configured to generate data indicative of at least one of a movement of the firearm, an orientation of the firearm, or a direction of the firearm, and a communication circuit configured to communicate the data generated using the inertial measurement unit to a device external to the firearm, and a microcontroller module configured to deliver power from a power source to at least one of the inertial measurement unit or the communication circuit, wherein at least the inertial measurement unit is disposed within an action structure of the firearm.

Systems and methods are provided for a firearm monitoring system comprising an inertial measurement unit configured to generate data indicative of at least one of a movement of the firearm, an orientation of the firearm, a direction of the firearm, or a location of the firearm, and a communication circuit configured to communicate the data generated using the inertial measurement unit to a device external to the firearm, and a microcontroller module configured to deliver power from a power source to at least one of the inertial measurement unit or the communication circuit, wherein at least the inertial measurement unit is disposed within a barrel structure of the firearm.

Systems and methods are provided for firearm usage monitoring, including a battery configured to power components of the firearm, a communication interface and a controller running application software configured to: power, via the battery, the components of the firearm in a first sensing mode; monitor, via the communication interface, density of electromagnetic radiation proximate the firearm; harvest, in response to the electromagnetic radiation density exceeding, power from the electromagnetic radiation via a wireless-energy harvesting mechanism having a receiving antenna configured to receive a local electromagnetic signal, a rectifier configured to convert the received signal to direct current, and a DC-DC converter configured to alter voltage of the direct current to a desired voltage; and operate, via the battery and the harvested power, the components of the firearm in a second sensing mode, the second sensing mode expending more energy than the first sensing mode.

Systems and methods are provided for firearm monitoring, including a server device running application software that receives signals from firearms regarding usage thereof and a controller running application software configured to communicate with a connected device via a communication interface, detect a jamming signal that inhibits communication with the connected device, stop, in response to detecting the jamming signal, communication with the connected device, and harvest, in response to detecting the jamming signal, power from the jamming signal via a wireless-energy harvesting mechanism having a receiving antenna configured to receive the jamming signal, a rectifier configured to convert the received signal to direct current, and a DC-DC converter configured to alter voltage of the direct current to a desired voltage.

Systems and methods are provided for operating a firearm, including communicating with a connected device via a communication interface, detecting a local energy source in a radio frequency, and harvesting power from the local energy source in the radio frequency via a wireless-energy harvesting mechanism having a receiving antenna configured to receive the local energy source in the radio frequency, a rectifier configured to convert the received signal to direct current, and a DC-DC converter configured to alter voltage of the direct current to a desired voltage.

A method of synchronizing flashing of a plurality of marker systems includes within each marker system of the plurality of marker systems, receiving a signal from at least one global positioning satellite, the signal comprising a time value. Then, when initiating illumination of at least one light emitting device of the marker systems, synchronizing of the initiating illumination to the time value.

A method of synchronizing flashing of a plurality of marker systems includes within each marker system of the plurality of marker systems, receiving a signal from at least one global positioning satellite, the signal comprising a time value. Then, when initiating illumination of at least one light emitting device of the marker systems, synchronizing of the initiating illumination to the time value.

Methods and systems of firearm monitoring and firearm resupply are provided, including application software that receives signals from firearms and firearm-based sensors related, in part, to ammunition levels associated with at least one firearm, and evaluating, via an event model, the sensor information, and determining, via the evaluation, the occurrence of one or more of specified and monitored events in order to display, in response to determining that a monitored event will occur, a recommended action such as a resupply of ammunition.

A system includes a first jacket that contains seawater and a first tank storing a first fluid under pressure. A second jacket contains seawater and a second tank storing a second fluid under pressure. An actuator cylinder defines a space that receives the fluids from the first and second tanks. The actuator cylinder includes an actuator piston that divides the space into a first volume for the first fluid and a second volume for the second fluid. A hydraulic cylinder includes a hydraulic piston configured to move and change an amount of hydraulic fluid in the hydraulic cylinder, wherein the hydraulic piston is fixedly coupled to the actuator piston. A buoyancy plug changes a position in connection with the amount of the hydraulic fluid in the hydraulic cylinder, wherein the position of the buoyancy plug affects a buoyancy of a vehicle.