A vessel includes a body that floats in water. One or more thrusters and sensors are provided on the body. A controller is configured to selectively activate the thrusters to cause the vessel to move along a path through the water, receive sensor data from the one or more sensors while the vessel is moving along the path, determine, based on the sensor data, whether an obstacle or a dangerous condition is present in the water; control the thrusters to avoid the obstacle, and output a warning when the dangerous condition is present in the water. The collected sensor data may relate to locations and directions of currents in the water, the dangerous condition may relate to a rip current, and the warning may identify at least one attribute of the rip current. A map identifying a location of the dangerous condition may be generated and forwarded to other devices.

A battery powered do-it-yourself (DIY) swimming pool sensor and alarm unit that is removably mounted in a floating assembly. The sensor monitors movement in the pool and around the pool deck and provides remote video alerts to designated cell phones as well as a localized audible and visual alarm when motion is detected. It has an above waterline camera and a below waterline camera that provides a video feed for further remote investigation. It utilizes a float stabilizing means to ensure the floating assembly is not capsized by large waves or wind. It cannot be defeated because of its floating location, and can be simply installed and set up by the average homeowner. Optionally, it has sensors that monitor the pool water's chemistry and provides the results to an owner's cell phone or to a remote chemical dispensing unit located at the pool.

The present invention disclose an occupancy detection device and related system and method for detecting presence of at least one person at or near a table or in a swimming pool with at least one sensor indicating an occupancy status locally with at least one light source and communicating it to at least one mobile device by means of at least one wireless communication method. The occupancy detection device, with the use of at least one sensor, at least one additional status is communicated to at least one mobile device. A plurality of occupancy detectors can be connected in a mesh or a star network and communicate to at least one mobile device by a wireless communication method or combinations of a wired and a wireless communication methods.

It is provided a method of detecting human drowning, comprising: attempting to detect humans in a sequence of underwater images taken by a single camera, for identifying humans-in-water candidates in the images, said detection using at least a machine learning algorithm, tracking humans-in-water candidates throughout this sequence, and detecting human drowning risk. It is also provided a system for detecting human drowning, comprising at least one underwater camera configured to take at least a sequence of underwater images, the system being configured to attempt to detect humans in the sequence of underwater images, for identifying humans-in-water candidates in the images, said detection using at least a machine learning algorithm, track humans-in-water candidates throughout this sequence, and detect human drowning risk.

A computer implemented method including receiving, by a monitoring system that is configured to monitor a property and from an electronic pool device that is configured to monitor a swimming pool at the property, sensor data, analyzing, by the monitoring system, the sensor data, based on analyzing the sensor data, generating, by the monitoring system, an instruction to activate a camera of the electronic pool device, providing, by the monitoring system to the electronic pool device, the instruction to activate the camera, receiving, by the monitoring system from the electronic pool device, image data, analyzing, by the monitoring system, the image data, based on analyzing the image data, identifying a monitoring system action to perform, and performing the monitoring system action.

An adjustable surf wake system enhances a wake formed by a watercraft travelling through water. The system may include a flap for deflecting water traveling past the stern of the watercraft, and/or a positioner operably connected to the flap for positioning the flap relative to a longitudinal axis of the watercraft between a neutral position and an outward position. Positioning a port flap in its extended position enhances a starboard surf wake, and positioning the starboard flap in its extended position enhances a port surf wake. A wake modifying system for modifying a wake produced by a watercraft traveling through water may include a rudder pivotally mounted to the watercraft for steering the watercraft, a fin pivotally mounted to the watercraft substantially along a centerline of the watercraft and forward the rudder, wherein the fin pivots about an upright axis to modify the wake produced by the watercraft traveling through the water, an actuator mounted within the watercraft and operably coupled to the fin for pivoting the fin relative to the centerline, and a controller mounted on the watercraft allowing an operator to control the actuator and selectively pivot the fin to a desired angle θd relative to the centerline.

A submersion sensor for detecting submersion in a fluid is disclosed. The submersion sensor includes at least one float member and at least one sink member. The submersion sensor includes force sensors positioned at distal ends of each of the at least one float member and the at least one sink member. Further, the submersion sensor includes a controller. The controller determines submersion of the submersion sensor upon obtaining signals from the force sensors corresponding to opposite directional movement of the at least one float member and the at least one sink member in the fluid.

A fluid pit safety system is disclosed to prevent drowning incidents in a fluid pit filled with a fluid. The system comprises a plurality of sensors spatially disposed adjacent the fluid pit, a perimeter detection sub-system defining a perimeter arranged around an edge of the fluid pit, and a rescue device arranged in the fluid pit. The plurality of sensors are configured to detect a change in fluid height in the fluid pit. The perimeter detection sub-system is configured to detect a disruption in the perimeter. The rescue device is configured to move towards a surface of the fluid in the fluid pit in response to the plurality of sensors detecting the change in the fluid height in the fluid pit and the perimeter detection sub-system detecting the disruption in the perimeter.

A monitor control unit that is configured to receive, from the electronic pool device, the sensor data, compare the sensor data to a threshold, based on comparing the sensor data to a threshold, determine that the sensor data exceeds the threshold, based on determining that the sensor data exceeds the threshold, provide an instruction to initiate the capture of image data by the camera of the electronic pool device, receive, from the camera of the electronic pool device, the image data, analyze the image data, based on analyzing the image data, identify a monitoring system action to perform, and perform the monitoring system action.

A system and method for the detection of events such as drowning and/or unauthorized entry to a body of water by use of a hydrophone based system and signal processing techniques.