A vessel includes a body, such as surfboard, that floats in water. One or more thrusters, and one or more 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 a dangerous condition is present in the water; and output a warning when the dangerous condition is present in the water. For example, 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.

In some embodiments, a lighting assembly including at least one light-emitting device positioned within a housing is disclosed, wherein the housing is designed to allow an ambient environment to pass into the housing and transfer heat from the at least one light-emitting device. The light-emitting area of the light-emitting device may be sealed from the ambient environment. In some embodiments, the housing may include at least one recess, port, or other opening configured to allow a liquid or gas to promote heat transfer from the light-emitting device. In some embodiments, a vehicle, a marine system, or other systems may include at least one lighting assembly as contemplated herein.

A system for securing a submerged buoy including a signalling element floating on the surface and connected to the buoy by a link, said securing system being wherein it includes a reversible coupling device comprising an attachment member secured to the end of the link opposite the signalling element, a complementary attachment member rigidly connected to the buoy and capable of engaging with said attachment member in order to allow the link to be secured to or released from the buoy, a pressure sensor, a control unit associated with a timemeasurement unit, said control unit ordering said complementary attachment member to separate from said attachment member when a pressure variation, measured by associating said pressure sensor and said time-measurement unit, is higher than a set value.

A system for securing a submerged buoy including a signalling element floating on the surface and connected to the buoy by a link, said securing system being wherein it includes a reversible coupling device comprising an attachment member secured to the end of the link opposite the signalling element, a complementary attachment member rigidly connected to the buoy and capable of engaging with said attachment member in order to allow the link to be secured to or released from the buoy, a pressure sensor, a control unit associated with a timemeasurement unit, said control unit ordering said complementary attachment member to separate from said attachment member when a pressure variation, measured by associating said pressure sensor and said time-measurement unit, is higher than a set value.

In a rescue network system for a watercraft, a transmitter transmits a first distress signal of the watercraft to which it belongs. A receiver receives a second distress signal from another watercraft. An output outputs emergency information indicating the existence of the second distress signal from the another watercraft. A controller is configured or programmed to control the output to output the emergency information when the receiver has received the second distress signal from the another watercraft.

A floating vessel comprising: (a) opposing hulls; (b) a beam extending between and interconnecting the opposing hulls; and (c) a deck supported by the beam and positioned between the opposing hulls, wherein the floating vessel is modular and configured for easy assembly, disassembly, or both.

A floating vessel comprising: (a) opposing hulls; (b) a beam extending between and interconnecting the opposing hulls; and (c) a deck supported by the beam and positioned between the opposing hulls, wherein the floating vessel is modular and configured for easy assembly, disassembly, or both.

A navigation method for a ship which includes: a plurality of main generators that feed power to navigation equipment used in normal navigation and appliances for the living quarters provided within a ship body; and an emergency generator that feeds power to emergency equipment in case of fire or flood. The navigation method includes: an emergency power feeding step for feeding power to the emergency equipment using the emergency generator when at least one of the plurality of main generators is disabled due to fire or flood; and a return-to-port power feeding step for feeding power to return-to-port equipment, required for navigation for returning to port, using the main generators and the emergency generator after the fire or flood has subsided.

A navigation method for a ship which includes: a plurality of main generators that feed power to navigation equipment used in normal navigation and appliances for the living quarters provided within a ship body; and an emergency generator that feeds power to emergency equipment in case of fire or flood. The navigation method includes: an emergency power feeding step for feeding power to the emergency equipment using the emergency generator when at least one of the plurality of main generators is disabled due to fire or flood; and a return-to-port power feeding step for feeding power to return-to-port equipment, required for navigation for returning to port, using the main generators and the emergency generator after the fire or flood has subsided.

A light source assembly for use by a user includes a housing assembly and a moving beam light source. The moving beam light source is positioned substantially within the housing assembly. The moving beam light source generates a source output beam that is directed away from the housing assembly at an angle relative to a rotation axis as a moving output beam while being rotated about the rotation axis. The moving beam light source is a non-visible light source that generates the source output beam having a center wavelength that is outside a visible light spectrum.