An embodiment can include a vessel-towed system that includes a first towing/communication interface system, e.g., a first tow cable with a fiber optic system, and spaced apart buoys for supporting the first tow cable. A first mobile structure including a first control system and first type of emitter, e.g., an attraction system, is connected to the first tow cable. A second mobile structure is provided that can include an underwater towed emitter such as an audio emulation system. The first and second emitters can be configured emit a first and second plurality of emissions for inducing a receiving entity response. The second mobile structure is coupled with the first mobile structure with a second tow cable that comprises another fiber optic cable. An automated response or manual control systems can be provided on the towing vessel and the first mobile structure adapted to operate the first and second emitters.

Image recording as long as possible during one activity is required in deep sea exploration. Necessity of multi-directional image recording, optical and chemical observations and probing of mineral resources of seabed are also increased. There is no underwater exploration device enable these requirements. It is disclosed that at least one battery-driven underwater exploration body having three pressure-resistant hollow glass spheres for housing an image capturing device, an illumination device, a recording device, an acoustic communication device and a control device controlling thereof and at least one battery body having an approximately the same shape and structure as the underwater exploration body are connected with each other by a connecting tool to provide the connectedly-formed underwater exploration device.

An underwater exploration system enables signal transmission and reception to and from an underwater vehicle through wireless communication, that enables carriage of the underwater vehicle to a survey point and collection of the underwater vehicle, and, further, that enables a quick change of the survey point. The underwater exploration system includes: an underwater exploration unit including: a floating member including a first antenna and configured to support the first antenna above a water surface; and an underwater vehicle connected to the first antenna via a signal line; a communication device including a second antenna configured to transmit and receive a wireless signal to and from the first antenna; and an unmanned aerial vehicle configured to carry the underwater exploration unit and drop the underwater exploration unit to the water surface.

An underwater exploration system enables signal transmission and reception to and from an underwater vehicle through wireless communication, that enables carriage of the underwater vehicle to a survey point and collection of the underwater vehicle, and, further, that enables a quick change of the survey point. The underwater exploration system includes: an underwater exploration unit including: a floating member including a first antenna and configured to support the first antenna above a water surface; and an underwater vehicle connected to the first antenna via a signal line; a communication device including a second antenna configured to transmit and receive a wireless signal to and from the first antenna; and an unmanned aerial vehicle configured to carry the underwater exploration unit and drop the underwater exploration unit to the water surface.

A system for the collection of visual and related data on marine and other underwater habitats and fauna, in particular and without limitation for benthic habitats over significant spatial scales. The system can include elements such as a digital or video camera to receive visual images, various sensors to sense other related data and waterproof housings to protect various elements of the device. A sensor may for example be a global positioning system. The device can also include elements to control the device and to record, transfer & process the data.

A system for the collection of visual and related data on marine and other underwater habitats and fauna, in particular and without limitation for benthic habitats over significant spatial scales. The system can include elements such as a digital or video camera to receive visual images, various sensors to sense other related data and waterproof housings to protect various elements of the device. A sensor may for example be a global positioning system. The device can also include elements to control the device and to record, transfer & process the data.

An autonomous underwater vehicle including an underwater vehicle main body incorporating a power source, a buoy connected to the underwater vehicle main body through a rope, and an ejector configured to, with the underwater vehicle main body floating on a sea surface, eject the buoy from the underwater vehicle main body by compressed gas in an obliquely upward direction.

An autonomous underwater vehicle including an underwater vehicle main body incorporating a power source, a buoy connected to the underwater vehicle main body through a rope, and an ejector configured to, with the underwater vehicle main body floating on a sea surface, eject the buoy from the underwater vehicle main body by compressed gas in an obliquely upward direction.

An imaging unit is configured to capture an image of a subject in the water. A lighting unit is configured to illuminate the subject. A histogram generator is configured to divide a range from the minimum to the maximum luminance values of a luminance signal, included in an image signal generated by capturing the image of the subject into a plurality of luminance groups, and to generate histogram data representing the distribution of frequencies of the plurality of luminance groups. Based on the generated histogram data, a histogram analyzer is configured to analyze the distribution of frequencies of the plurality of luminance groups. According to the result of the analysis for the histogram data by the histogram analyzer, a distance controller is configured to control to adjust the distance between the subject and the lighting unit.

A coupling device for recovering an unmanned ship includes: a coupling unit, which is lifted and lowered by being connected to a crane provided in a mother ship; an accommodation unit provided in the unmanned ship, and having a vertically communicating coupling hole; a guide unit performing guiding such that the coupling unit is coupled to the accommodation unit, and including a towing line formed to be long, and a winch connected to the other side of the towing line so as to selectively wind or unwind the towing line; and a control unit including a sensing part for sensing the tension applied to the towing line by the driving of the winch, and a control part for lowering the coupling unit connected to the crane, if the intensity of the tension sensed by the sensing part is a preset value or higher.