A collapsible land-based multi-directional signal assembly includes a signal display assembly having one or more display surface, and at least one signal indicia affixed to each display surface. A collapsible land-based collapsible multi-directional signal assembly includes a multi-directional signal display assembly comprising a plurality of signal display panels. Each of the plurality of signal display panels comprising at least one display surface, and a plurality of signal indicia are affixed onto different ones of each of the plurality of display surfaces. A signal support assembly is provided such that the collapsible land-based multi-directional signal display assembly is disposable into a deployed orientation about the signal support member.

A collapsible land-based multi-directional signal assembly includes a signal display assembly having one or more display surface, and at least one signal indicia affixed to each display surface. A collapsible land-based collapsible multi-directional signal assembly includes a multi-directional signal display assembly comprising a plurality of signal display panels. Each of the plurality of signal display panels comprising at least one display surface, and a plurality of signal indicia are affixed onto different ones of each of the plurality of display surfaces. A signal support assembly is provided such that the collapsible land-based multi-directional signal display assembly is disposable into a deployed orientation about the signal support member.

A buoy corrosion detection system includes a buoy having a double hull section in which the outer hull is designed to corrode and fail prior to the rest of the hull. The double hull section is positioned at the waterline, which is the area most prone to corrosion. As the outer hull corrodes, water passes through the hull and is detected by a moisture detector. The moisture detector then relays a signal that water has entered through the hull, and a signaling circuit then sends a communication signal to the user indicating that the buoy has corrosion. The buoy corrosion detection system leads to an as-needed maintenance cycle for buoys.

A system and method for tracking marine equipment is provided. Generally, the system and method of the present disclosure are designed to generate indicia corresponding to the inventory level of marine equipment used for a particular marine activity. To facilitate the assignment of indicia reflecting the inventory level of marine equipment used for a marine activity, the system and method of the present disclosure uses a plurality of equipment profiles having a defined lower limit and quantity associated with each piece of marine equipment. The lower limit may be manually input or automatically generated. The quantity may be tracked by the system using equipment transmitters and equipment sensors. In a preferred embodiment, the indicia indicate whether the quantity of a piece of marine equipment has fallen below a certain specified level as defined by the user. Users may purchase new marine equipment from third-party retailers via the user interface.

A buoy corrosion detection system includes a buoy having a double hull section in which the outer hull is designed to corrode and fail prior to the rest of the hull. The double hull section is positioned at the waterline, which is the area most prone to corrosion. As the outer hull corrodes, water passes through the hull and is detected by a moisture detector. The moisture detector then relays a signal that water has entered through the hull, and a signaling circuit then sends a communication signal to the user indicating that the buoy has corrosion. The buoy corrosion detection system leads to an as-needed maintenance cycle for buoys.

A lighthouse lantern comprising a power supply and a phosphor-containing emitter is disclosed. The lighthouse lantern includes a power supply; a laser diode configured for receiving power from the power supply and irradiating laser in one direction; a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter. In accordance with the present disclosure, the lighthouse lantern may generate high output with low input power and thus has improved power efficiency, may suppress frequent failures near sea or seawater, and may reduce production costs.

A lighthouse lantern comprising a power supply and a phosphor-containing emitter is disclosed. The lighthouse lantern includes a power supply; a laser diode configured for receiving power from the power supply and irradiating laser in one direction; a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter. In accordance with the present disclosure, the lighthouse lantern may generate high output with low input power and thus has improved power efficiency, may suppress frequent failures near sea or seawater, and may reduce production costs.

A method comprises transmitting (901) a first ultrasonic ping signal from a first floating unit (M1). The first ultrasonic ping signal is received in an underwater device (D1, D2, D3). After a predetermined delay from the reception of the first ultrasonic ping signal, the underwater device transmits (905) a second ultrasonic ping signal from the underwater device. The second ultrasonic ping signal is received in the first floating unit. The first floating unit determines a time difference between a time of transmission of the first ultrasonic ping signal from the first floating unit and a time of reception of the second ultrasonic ping signal, and based on the time difference, provides location information and/or other information to the underwater device by transmitting (910) to the underwater device sequential underwater ultrasonic ping signals such that time differences between the sequential underwater ultrasonic ping signals indicate the provided information.

A buoyant support (1) for an object (2), with at least the following components: a floating body (3), an insertion sleeve (7) for holding the object (2) and a clamping device (4) with at least one upper-side clamping part (5) and at least one lower-side clamping part (6), Due to the modular construction, the support can be dismantled into its individual parts, in order to thus facilitate the transport thereof. The components of the support are dimensioned such that these can be easily accommodated and stowed in a carrying bag.

A navigation device is provided, which may include an acquiring module and a route creating module. The acquiring module may acquire at least a departing location, a destination location and nautical chart information to be used for creating a traveling route for a ship. When a given navigable area is divided into a first navigable area and a second navigable area based on a given condition, the route creating module may create a route being shorter in total distance and taking priority in passing the first navigable area than the second navigable area, based on the departing location, the destination location, and the nautical chart information.