A leak detection system includes a light source configured to output emitted light into a region of water, and a light detector configured to receive returned light from the region of the water and to output a detector signal indicative of the returned light. The leak detection system also includes at least one controller configured to detect hydrocarbons within the region of the water in response to detecting a hydrocarbon wavelength within the returned light, to determine at least one position of the hydrocarbons within the region of the water based on a time difference between a first time at which the emitted light is output from the light source and a second time at which the returned light at the hydrocarbon wavelength is received at the light detector, and to generate a three-dimensional model of a subsea structure based on the detector signal.

A sonar system and method enable performing angled-looking sonar (ALS) by emitting sonar waves in a forward and downward direction from sonar transducers located at an underwater vessel. The sonar waves may be received by sonar transducers located al the underwater vessel. Additionally, a variable geometry sonar system and method enable performing side scan sonar (SSS) and ALS by moving al least one sonar transducer to perform both SSS and ALS. The variable geometry sonar system may be used with an underwater vessel to perform mine countermeasure (MCM) missions by using ALS for a homing phase on a target.

A sonar system and method enable performing angled-looking sonar (ALS) by emitting sonar waves in a forward and downward direction from sonar transducers located at an underwater vessel. The sonar waves may be received by sonar transducers located al the underwater vessel. Additionally, a variable geometry sonar system and method enable performing side scan sonar (SSS) and ALS by moving al least one sonar transducer to perform both SSS and ALS. The variable geometry sonar system may be used with an underwater vessel to perform mine countermeasure (MCM) missions by using ALS for a homing phase on a target.

Multiple autonomous underwater vehicles (AUVs) are operated by a host platform by configuring the AUVs with intermediate nodes (such as unmanned surface vehicles (USVs)) so as to allow the host platform to manage multiple AUVs. The intermediate nodes act as a relay for communications between the host platform and the AUVs allowing the host platform to scale to higher numbers of vehicles thus simultaneously operating the entire fleet of AUVs. The AUVs may provide underwater mapping data. The host platform may be stationary. The host platform may communicate with the intermediate nodes by satellite.

Multiple autonomous underwater vehicles (AUVs) are operated by a host platform by configuring the AUVs with intermediate nodes (such as unmanned surface vehicles (USVs)) so as to allow the host platform to manage multiple AUVs. The intermediate nodes act as a relay for communications between the host platform and the AUVs allowing the host platform to scale to higher numbers of vehicles thus simultaneously operating the entire fleet of AUVs. The AUVs may provide underwater mapping data. The host platform may be stationary. The host platform may communicate with the intermediate nodes by satellite.

Infrastructure monitoring relevant to offshore power cable inspection through the use of an Autonomous Underwater Vehicle (“AUV”) carrying a small magnetometer to localize and map underwater power cables. The method comprises using an AUV to cover a series of transects across a known cable corridor to localize subsea and buried power transmission cables in the marine environment for mapping and/or subsequent navigational aiding.

Infrastructure monitoring relevant to offshore power cable inspection through the use of an Autonomous Underwater Vehicle (“AUV”) carrying a small magnetometer to localize and map underwater power cables. The method comprises using an AUV to cover a series of transects across a known cable corridor to localize subsea and buried power transmission cables in the marine environment for mapping and/or subsequent navigational aiding.

A system for cleaning a structure arranged in a body of water. The system includes: a vehicle operable to move through the water and clean the structure; a tether connectable between the vehicle and a fixed position; a deployment mechanism securable relative to the structure and configured to move the vehicle into, and out of, the water; and a processing unit configured to communicate with the vehicle and the deployment mechanism. The processing unit is configured to execute a repeating cleaning schedule to cause the deployment mechanism to operate to move the vehicle into the water, the vehicle to operate to clean at least a portion of the structure, and the mechanism to operate to remove the vehicle from the water.

A system for cleaning a structure arranged in a body of water. The system includes: a vehicle operable to move through the water and clean the structure; a tether connectable between the vehicle and a fixed position; a deployment mechanism securable relative to the structure and configured to move the vehicle into, and out of, the water; and a processing unit configured to communicate with the vehicle and the deployment mechanism. The processing unit is configured to execute a repeating cleaning schedule to cause the deployment mechanism to operate to move the vehicle into the water, the vehicle to operate to clean at least a portion of the structure, and the mechanism to operate to remove the vehicle from the water.

Multiple autonomous underwater vehicles (AUVs) are operated by a single host surface vehicle (HSV) by configuring the AUVs with intermediate nodes (such as unmanned surface vehicles (USVs)) so as to allow the HSV to manage multiple AUVs. The intermediate nodes act as a relay for communications between the HSV and the AUVs allowing the HSV to scale to higher numbers of vehicles thus simultaneously operating the entire fleet of AUVs. The AUVs may provide underwater mapping data.