Abstract: In a particular embodiment, coordinating an aerial search among unmanned aerial vehicles is disclosed that includes receiving, by a server in a UAV transportation ecosystem, search area data, accessing, by the server, UAV parameters for a type of UAV, determining, by the server in dependence upon the search area data and the UAV parameters, a number of UAVs needed to complete a coordinated aerial search of a search area within a time limit, and partitioning, by the server, the search area into a plurality of partitions, wherein the number of partitions is equal to the number of UAVs.

Abstract: Recovery of a flying vehicle that has fallen to the ground is facilitated. A positioning unit measures a position of the flying vehicle during flight. A specification unit specifies a feature of a region on the ground corresponding to the measured position. A determination unit determines a sending interval of position information indicating the position of the flying vehicle, according to the specified feature. A sending unit sends the position information at the determined sending interval.

Abstract: A drone system is configured to capture an audio stream that includes voice commands from an operator, to process the audio stream for identification of the voice commands, and to perform operations based on the identified voice commands. The drone system can identify a particular voice stream in the audio stream as an operator voice, and perform the command recognition with respect to the operator voice to the exclusion of other voice streams present in the audio stream. The drone can include a directional camera that is automatically and continuously focused on the operator to capture a video stream usable in disambiguation of different voice streams captured by the drone.

Abstract: Systems, devices, and methods for receiving, by a processor having addressable memory, data representing a geographical area for imaging by one or more sensors of an aerial vehicle; determining one or more straight-line segments covering the geographical area; determining one or more waypoints located at an end of each determined straight-line segment, where each waypoint comprises a geographical location, an altitude, and a direction of travel; determining one or more turnarounds connecting each of the straight-line segments, where each turnaround comprises one or more connecting segments; and generating, by the processor, a flight plan for the aerial vehicle comprising: the determined one or more straight-line segments and the determined one or more turnarounds connecting each straight-line segment.

Abstract: A method of controlling an unmanned aerial vehicle (UAV) to access a network, applicable to a UAV control terminal, and comprising: acquiring, through a first communication circuit, information to be transmitted between the UAV and a mobile communication network; forwarding, to a second communication circuit, the information to be transmitted; and transmitting, through the second communication circuit, the information to be transmitted to an information receiving end comprising the UAV or a target base station of the mobile communication network; wherein the first communication circuit and the second communication circuit are of different types comprising a cellular communication circuit and a wireless local area network (WLAN) communication circuit. A UAV control terminal and a base station are further provided.

Abstract: An Aerial Robotics Network (ARN) Management Infrastructure (MI) (also referred to as ARNMI) that provides a mechanism for the management of aerobots.

Abstract: An unmanned ground vehicle (UGV) includes one or more motors configured to drive one or more wheels of the UGV, a memory storing instructions, and a processor coupled to the one or more motors and the memory. The processor is configured to execute the instructions to cause the UGV to determine location information of a movable target; calculate a direction and a speed for the unmanned ground vehicle based on the determined location information; and drive the one or more motors to move the unmanned ground vehicle in the calculated direction at the calculated speed to follow the movable target when the movable target moves.

Abstract: Methods and systems are disclosed for an unmanned aerial vehicle (UAV) configured to autonomously navigate a physical environment while capturing images of the physical environment. In some embodiments, the motion of the UAV and a subject in the physical environment may be estimated based in part on images of the physical environment captured by the UAV. In response to estimating the motions, image capture by the UAV may be dynamically adjusted to satisfy a specified criterion related to a quality of the image capture.

Abstract: A method for adaptive mission execution by an unmanned aerial vehicle includes receiving a set of pre-calculated mission parameters corresponding to an initial UAV mission; collecting UAV operation data during flight of the unmanned aerial vehicle; calculating a set of modified mission parameters from the set of pre-calculated mission parameters and the UAV operation data, the set of modified mission parameters corresponding to a modified UAV mission; and executing the modified UAV mission on the unmanned aerial vehicle.

Abstract: Disclosed herein are embodiments for providing altitude reporting. Some embodiments may include receiving a query from a first vehicle regarding altitude data of the first vehicle, providing the altitude data to the first vehicle, and receiving, by the computing device, a computed altitude from the first vehicle. Some embodiments include calculating an altitude uncertainty parameter for the first vehicle, determining a true altitude from the altitude data and the altitude uncertainty parameter, and determining whether the true altitude is within a predetermined threshold of a second altitude of a second vehicle. Some embodiments may be configured for, in response to determining that the true altitude is within the predetermined threshold, notifying at least one of the following: the first vehicle or the second vehicle.

Abstract: A method of surveying roads includes generating a dynamic flight plan for a drone using a vehicle traveling on a road as a target. The dynamic flight plan includes instructions for movement of the drone. The method includes controlling the drone as a function of position of the vehicle based on the dynamic flight plan. The method includes maintaining, based on the controlling, line of sight with the drone while the drone with an onboard camera follows the vehicle and captures images of the road being traveled by the vehicle using the onboard camera.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for unmanned aerial vehicle authorization and geofence envelope determination. One of the methods includes determining, by an electronic system in an Unmanned Aerial Vehicle (UAV), an estimated fuel remaining in the UAV. An estimated fuel consumption of the UAV is determined. Estimated information associated with wind affecting the UAV is determined using information obtained from sensors included in the UAV. Estimated flights times remaining for a current path, and one or more alternative flight paths, are determined using the determined estimated fuel remaining, determined estimated fuel consumption, determined information associated wind, and information describing each flight path. In response to the electronic system determining that the estimated fuel remaining, after completion of the current flight path, would be below a first threshold, an alternative flight path is selected.

Abstract: Examples for flight navigation determination are presented herein. An example may involve obtaining a target destination for an aircraft and determining an initial flight path between a current location and the target destination. The flight path may include a series of waypoints for guiding navigation. The example may further involve obtaining terrain information that represents elevations of obstacles along the initial flight path and modifying the initial flight path to generate a revised flight path using the terrain information. The revised flight path may include modifications to the series of waypoints of the initial flight path such that navigation of the revised flight path avoids obstacles positioned along the initial flight path. The obstacles may have an elevation that exceeds an adjustable threshold elevation that depends on the initial flight path. The example may further involve providing the revised flight path to a navigation system of the aircraft.

Abstract: Aspects described herein relate to a network for providing air-to-ground wireless communication in various cells. The network includes a first base station array, each base station of which includes a respective first antenna array defining a directional radiation pattern that is oriented in a first direction, wherein each base station of the first base station array is disposed spaced apart from another base station of the first base station array along the first direction by a first distance. The network also includes a similar second base station array where the second base station array extends substantially parallel to the first base station array and is spaced apart from the first base station array by a second distance to form continuous and at least partially overlapping cell coverage areas between respective base stations of the first and second base station arrays.

Abstract: A system for monitoring the state of health of a monitored aircraft engine comprises an anomaly detection unit which analyses engine operating parameters and raises an alarm if a result of the analysis of one of the engine operating parameters crosses a threshold, the alarm being associated with a probability of a given type of engine damage occurring. The system further comprises an engine operating conditions monitoring unit which determines a state of wear of the engine, and an alarm corroboration unit which weights the said probability of occurrence by the determined state of wear. The invention is applicable to the preventive maintenance of turbomachines.

Abstract: This disclosure relates to systems and methods for controlling an unmanned aerial vehicle. Boundaries of a user-defined space may be obtained. The boundaries of the user-defined space may be fixed with respect to some reference frame. A user-defined operation associated with the user-selected space may be obtained. Position of the unmanned aerial vehicle may be tracked during an unmanned aerial flight. Responsive to the unmanned aerial vehicle entering the user-defined space, the unmanned aerial vehicle may be automatically controlled to perform the user-defined operation.

Abstract: Provided is a method for an autonomous vehicle to handle goods in collaboration with an unmanned aerial vehicle. The method comprises recognizing an unmanned aerial vehicle loading goods by the autonomous vehicle, capturing an image of the recognized unmanned aerial vehicle by the autonomous vehicle, analyzing the captured image to recognize a marker by the autonomous vehicle, adjusting a relative position of the autonomous vehicle and the unmanned aerial vehicle by moving the autonomous vehicle based on a recognition result of the marker, and taking over the goods from the unmanned aerial vehicle by the autonomous vehicle after position adjustment is completed.

Abstract: An information processing device includes a first acquisition member configured to obtain information relating to an aerial photography range for aerial photographing a first aerial photography image, a segmenting member configured to segment the aerial photography range into multiple areas based on a feature of each imaged object existing in the aerial photography range, and a determination member to determine a first imaging mode for aerial photographing the first aerial photography image based on the segmented areas. The information processing device also includes a second acquisition member configured to obtain information of more than one path shape based on information of more than one imaging mode, and information of path shapes representing shapes of more than one aerial photography path, and the first imaging mode. The information processing device further includes a generating member configured to generate the first aerial photography path based on the at least one path shape.

Abstract: Provided is a method for an autonomous vehicle to handle goods in collaboration with an unmanned aerial vehicle. The method comprises recognizing an unmanned aerial vehicle loading goods by the autonomous vehicle, capturing an image of the recognized unmanned aerial vehicle by the autonomous vehicle, analyzing the captured image to recognize a marker by the autonomous vehicle, adjusting a relative position of the autonomous vehicle and the unmanned aerial vehicle by moving the autonomous vehicle based on a recognition result of the marker, and taking over the goods from the unmanned aerial vehicle by the autonomous vehicle after position adjustment is completed.

Abstract: An unmanned ground vehicle (UGV) includes one or more motors configured to drive one or more wheels of the UGV, a memory storing instructions, and a processor coupled to the one or more motors and the memory. The processor is configured to execute the instructions to cause the UGV to determine location information of a movable target; calculate a direction and a speed for the unmanned ground vehicle based on the determined location information; and drive the one or more motors to move the unmanned ground vehicle in the calculated direction at the calculated speed to follow the movable target when the movable target moves.

Abstract: An autonomous mobile device (AMD) uses sensors to explore a physical space and determine a map indicating the locations of obstacles. As data is later acquired, the map may be updated, resulting in changes to previously mapped obstacle positions. Navigability tests determine if a path can be found between a current location and a previously visited location. A failure to find a path may result in exploration of an area that includes the previously visited location. Submaps may be produced by the AMD as it moves through the physical space. An accuracy score of a selected submap is determined by comparing the selected submap with a partial global map created using submaps other than the selected submap. If the accuracy score is less than a threshold value, the selected submap may be discarded and an area in the physical space associated with the selected submap may be re-explored.

Abstract: Embodiments include apparatus and methods for route optimization in response to air flow for one or more wind section areas. The wind section areas may correspond to portions of an internal area of an intersection or an internal area of a pathway. The method include receiving weather data for a region including a geographic area corresponding to at least one path and accessing a 3D model for the geographic area corresponding to the at least one path. At least one air flow based on the weather data and the three-dimensional model is calculated to define wind sections in the geographic area corresponding to the at least one path. A weight is assigned to at least one of the of wind sections for route optimization in response to air flow through the wind sections.

Abstract: A system may include a receiver configured to receive sensor data from one or more aerial vehicles, the sensor data including map data including sensed data related to an aerial view from one or more aerial vehicles of terrain and objects on the terrain. The system may also include a map updating processor in communication with the receiver. The map updating processor may receive the map data and identify a geographic location and/or an orientation associated with the map data. The map updating processor may also align, based at least in part on the geographic location and/or the orientation, the map data with a virtual aerial map providing an aerial view of terrain and objects on the terrain. The map updating processor may also incorporate at least a portion of the map data into the virtual aerial map and generate an updated virtual aerial map.

Abstract: An advanced map matching algorithm is disclosed, which embeds the road topology inherently in a set of path candidates. Road connectivity is maintained even in special situations such as U-turns, reverse driving, and tunnels. Careful path candidate management is designed to reduce the candidate count while preserving well-matching candidates. Paths are treated and evaluated independently using multiple criteria, which makes the algorithm reliable and robust in different scenarios.

Abstract: Disclosed is a technique for providing an Object Recognition Based Horticultural Feedback Analysis (ORB-HFA) feedback loop using an unmanned aircraft system (UAS). The techniques include determining a position of an unmanned aerial vehicle (UAV) of the UAS within a grow operation and providing a mission including one or more operations to the UAV based at least on the position of the UAV and feedback from one or more sensors residing at least partially on a visual observer device of the UAS to direct the UAV to perform the one or more operations in the grow operation, wherein the UAV is configured to capture one or more images of one or more plants included in the grow operation as the UAV performs the one or more operations of the first mission.

Abstract: A drone system has a camera mounted to a frame of a drone, the camera configured to acquire image data upon receipt of a signal from a flight controller and a precision location device configured for continuously obtaining location data. Additionally, the drone system has a computing device configured for receiving a signal indicating that an image has been acquired, the computing device configured for transmitting a signal to a precision location device indicating that an image has been acquired, and the precision location device is further configured to record event data associated with a time indicating when the image was acquired.

Abstract: An unmanned aerial vehicle is disclosed. The unmanned aerial vehicle includes a memory, a sensor unit, a camera, a moving unit, and a processor. The sensor unit is configured to sense the unmanned aerial vehicle or a surrounding object. The camera configured to take an image. The moving unit configured to generate power to move the unmanned aerial vehicle. The processor is configured to determine whether a user makes contact with the unmanned aerial vehicle. The processor is also configured to control the moving unit to allow the unmanned aerial vehicle to hover at a second location when the unmanned aerial vehicle is moved from a first location to the second location by an external force of a predetermined magnitude or greater while the contact is maintained.

Abstract: Disclosed are an aerial image acquisition method and a system for investigating a traffic accident site by an unmanned aerial vehicle. The method comprises selecting a corresponding unmanned aerial vehicle low-altitude shooting scheme of traffic accident site according to whether three-dimensional site reconstruction or site animation simulation is needed; selecting and calculating shooting parameters of the unmanned aerial vehicle according to the unmanned aerial vehicle low-altitude shooting scheme selected; and shooting the traffic accident site according to the unmanned aerial vehicle low-altitude shooting scheme selected and the shooting parameters of the unmanned aerial vehicle, to obtain an aerial image sequence of the traffic accident site.

Abstract: Disclosed is support equipment for collecting a reusable rocket, the support equipment including a plurality of supports located on a landing platform and spaced apart from one another, a contact support pad having a contacting face to contact a reusable rocket when the reusable rocket is landing, and connected to each of the supports to secure the reusable rocket, and a distance sensor configured to sense a position of the reusable rocket or the contact support pad, wherein each of the supports is configured to move the contact support pad based on information on a distance measured by the distance sensor, and the contact support pad is configured to secure the reusable rocket when the reusable rocket has landed, in order to prevent damage of the reusable rocket.

Abstract: A fly-by-wire system for a rotorcraft includes a computing device having control laws. The control laws are operable to engage a roll command or a yaw command in response to deflection of a beep switch of a pilot control assembly, wherein a roll angle for the roll command or a yaw rate for the yaw command is determined based on forward airspeed of the rotorcraft. The beep switch may be disposed on a collective control of the pilot control assembly. The control laws are further operable to disengage the roll command or the yaw command in response to the beep switch being returned from a deflected position to a neutral position. In representative aspects, the roll angle or the yaw rate may correspond to a standard rate turn (e.g., 3° per second).

Abstract: An unmanned photographing device and method thereof is provided which includes establishing a wireless connection with an external electronic device using a communication device, receiving a first signal at a first three-dimensional (3D) position from the external electronic device through the wireless connection, the first signal comprising data associated with a first image comprising a first object, determining a second 3D position based on at least part of the data and the first 3D position, controlling the unmanned photographing device to fly to or near the second 3D position, tracking a second object corresponding to the first object using a camera, and capturing a second image comprising the second object at or near the second 3D position such that the second image corresponds to the first image.

Abstract: An embodiment includes at least one computer readable storage medium comprising instructions that when executed enable a system to: receive (a)(i) first radio signal location data for a first object from a radio sensor; and (a)(ii) first visual signal location data for the first object from a camera sensor; perform feature extraction on (b)(i) the first radio signal location data to determine first extracted radio signal features; and (b)(ii) the first visual signal location data to determine first extracted visual signal features; solve a first association problem between the first extracted radio signal features and the first extracted visual signal features to determine first fused location data; and store the first fused location data in the at least one computer readable storage medium. Other embodiments are described herein.

Abstract: This disclosure describes systems, methods, and apparatus for automating the verification of aerial vehicle sensors as part of a pre-flight, flight departure, in-transit flight, and/or delivery destination calibration verification process. At different stages, aerial vehicle sensors may obtain sensor measurements about objects within an environment, the obtained measurements may be processed to determine information about the object, as presented in the measurements, and the processed information may be compared with the actual information about the object to determine a variation or difference between the information. If the variation is within a tolerance range, the sensor may be auto adjusted and operation of the aerial vehicle may continue. If the variation exceeds a correction range, flight of the aerial vehicle may be aborted and the aerial vehicle routed for a full sensor calibration.

Abstract: Disclosed herein are an apparatus and method for reconstructing a 3D model. The apparatus for reconstructing a 3D model includes an image acquisition unit for acquiring multi-view images by receiving image signals captured by multiple drones using cameras, a geometric calibration unit for estimating motion variables of the drones based on the acquired multi-view images, and a 3D model creation unit for reconstructing a 3D model of a dynamic object from the matched multi-view images using a multi-view stereo method.

Abstract: A system and method for displaying nowcasts along a route on a map. The system receives a map request including a departure location and a destination location from a user, and obtains map data including a route between the destination location and the departure location. A nowcaster is used for outputting nowcasts for a number of key points along the route. The system modifies the map data to include a visual indicator for each nowcast for each key point such that when the modified map data is executed on a display the nowcasts are displayed along the route between the departure location and the destination location.

Abstract: A new method of dynamic control of a rotary-wing drone in throw start includes the steps of: a) initializing a predictive-filter altitude estimator; b) the user throwing the drone in the air with the motors turned off; c) detecting the free fall state; d) upon detecting the free fall state, fast start with turn-on of the motors, open-loop activation of the altitude control means, and closed-loop activation of the attitude control means; e) after a motor response time, stabilizing the drone by closed-loop activation of the altitude control means, and closed-loop activation of the attitude control means; f) detecting a stabilization state such that the total angular speed of the drone is lower than a predetermined threshold; and g) upon detecting the stabilization state, switching to a final state in which the drone is in a stable lift condition and pilotable by the user.

Abstract: The invention generally relates to enabling the management of survey data. One embodiment includes providing an upload description that describes characteristics of survey data to be uploaded, assigning a thread to process a group of files that store aspects of the survey data, dividing the file into data chunks, deriving from a given data chunk a corresponding data-integrity value and respectively associating the same with the given data chunk, communicating the data chunks to a remote storage device, utilizing the corresponding data-integrity values to ensure successful communication of the data chunk, and spatially storing the survey data such that it is retrievable upon a request that describes a geographic area of interest.

Abstract: An onboard flight management system in an aircraft comprises means for continuously calculating first geolocation data, from data received from at least one external geolocation device, comprising a current position and future positions of an aircraft along a trajectory sequenced in several portions and comprising second data comprising demands required by an international navigation procedure called “Required Navigation Performance”, or RNP, for all the portions of the trajectory. The management system additionally comprises a means for displaying first and second data all the way along the trajectory, the first and second data being represented graphically and simultaneously on the said display means in order to enable the pilot to anticipate the flight characteristics for the aircraft and make them converge toward the required demands of the next trajectory portion.

Abstract: A vehicle control system and method combining control allocation and phase compensation for forming a phase compensated actuator command signal based on a control demand signal. A feedback unit includes a matrix multiplication unit for forming an estimated behavior signal, from a control efficiency matrix and the actuator command signal. The estimated behavior signal is fed to a second summation unit for forming a difference signal. The difference signal is processed by a filter unit for forming a feedback signal which is connected to a first summation unit for forming a modified control demand signal, such that the modified control demand signal is adjusted to always represent a control demand realizable by the vehicle. The modified control demand signal is further connected to the second summation unit and to a control allocator which output is then connected to the matrix multiplier to form a feedback loop.

Abstract: A method for detecting piloting conflicts between the crew and the autopilot of an aircraft. According to the method, an automatic trajectory is programmed by checking whether the actual values of navigation parameters converge on said corresponding desired values within a predetermined convergence period; in the case where at least one of the actual values does not converge, within the convergence period, on the corresponding desired value, a predictive calculation is carried out, at consecutive future moments, of the value of at least one particular parameter selected amongst the navigation parameters; and in the case where the predicted value of the particular parameter is higher than a corresponding predefined threshold, an alarm is emitted for the crew of the aircraft to notify them about a piloting conflict being able to jeopardize the flight safety of the aircraft. A device for implementing the method. An aircraft including the device.

Abstract: The invention relates to a device aboard an aircraft comprising output means configured to restore information relating to the aircraft status from aircraft systems, the device including a module providing interface between said output means and said aircraft systems, said module being configured to synthesize information from aircraft systems depending on predetermined behavior rules and to transmit said information thus synthesized to said output means.

Abstract: Methods of illustrating one or more derated takeoffs of an aircraft on a runway where such illustrations are on a flight display in a cockpit of the aircraft and are based on various information and may allow pilots to make more accurate decisions related to derated takeoffs and full thrust takeoffs of the aircraft.

Abstract: A passive entry passive start (PEPS) vehicle security system configured to activate a vehicle function when an activation signal is received. The system includes a nomadic device configured to detect a change of a magnetic field relative to the nomadic device, and emit an activation signal only if the change corresponds to walking by an operator carrying the nomadic device.

Abstract: Method for dynamically limiting the inclinations of monoblock flight control surfaces (FCS) in an aircraft. Dynamic limitation of the FCS is activated if a stall susceptibility condition is detected in the current aircraft environment. The real-time calibrated airspeed of the aircraft, real-time angle of attack (AOA) of the aircraft, and real-time sideslip angle (AOS) of the aircraft are obtained. The aircraft parameters may be obtained via estimation if the measured values are deemed unsuitable. The real-time local AOA and AOS of the FCS are calculated based on the obtained aircraft parameters. The inclination of each of the FCS relative to the critical values is dynamically limited according to the calculated real-time local AOA and AOS of the FCS. The aircraft may be an unmanned aerial vehicle (UAV) and/or a V-tail aircraft. The stall susceptibility condition may include icy conditions.

Abstract: The present disclosure relates to an unmanned aerial vehicle (UAV) able to harvest energy from updrafts and a method of enhancing operation of an unmanned aerial vehicle. The unmanned aerial vehicle with a gliding capability comprises a generator arranged to be driven by a rotor, and a battery, wherein the unmanned aerial vehicle can operate in an energy harvesting mode in which the motion of the unmanned aerial vehicle drives the rotor to rotate, the rotor drives the generator, and the generator charges the battery. In the energy harvesting mode regenerative braking of the generator reduces the forward speed of the unmanned aerial vehicle to generate electricity and prevent the unmanned aerial vehicle from flying above a predetermined altitude.

Abstract: A highly reliable aerodynamic coefficient estimate can be computed, and computation of this aerodynamic coefficient estimate enables accurate detection of control surface failure/damage while reducing a discomfort for passengers. A deflection angle command signal generation means (5) generates a deflection angle command signal for estimating an aerodynamic coefficient indicating the aerodynamic characteristics of an airframe. A kinetic state quantity acquisition means (6) acquires a kinetic state quantity of the airframe that is obtained as a result of a control surface provided on the airframe being moved based on the deflection angle command signal. A candidate value calculation means (7) calculates candidate values for estimating the aerodynamic coefficient from the kinetic state quantity using two or more different estimations. An aerodynamic coefficient estimate determination means (8) determines an aerodynamic coefficient estimate based on the candidate values.

Abstract: Method and device for an optimal management of the energy of an aircraft. The device (1) includes means (5) for determining, in an iterative manner, according to a predicted energy state and according to a management strategy, optimal commands of means (S1,S2, S3, S4, S5, S6) for controlling the energy of the aircraft, which allow the aircraft to reach a given point of a trajectory in a given operational state.

Abstract: Systems and methods for managing the exchange of vehicle information between software modules with different safety importance. In one embodiment, a vehicle health management system includes a mission critical software module, a flight critical software module and a gatekeeper. The mission critical software module receives vehicle state information and provides it to the flight critical software module if the gatekeeper confirms the validity of the vehicle information.

Abstract: A hybrid vehicle electronic control unit (HV-ECU) includes a communication unit and a retransmission control unit. The communication unit performs a retransmitting process of data when a transmission error of the data is detected. The retransmission control unit inhibits the retransmitting process in a corresponding communication period and releases the retransmitting process when the corresponding communication period ends and the next communication period starts if the number of times that a transmission error is detected in a predetermined communication period is larger than a transmission stop determination threshold value.

Abstract: This disclosure relates to a system for preventing collisions with a terrain. The system includes a detecting means for detecting risks of collision with the terrain after a predetermined forecasting delay. The system further includes a determining means for determining, based on a trajectory followed by the aircraft, a possible limit point for success of the vertical terrain avoidance maneuver. The system further includes indication means for giving indications on azimuth clearance sections, around the direction in which the aircraft is moving, suitable for success of the vertical terrain avoidance maneuver. The system further includes means for estimating a free-travel distance in each azimuth clearance sector on a straight distancing trajectory with constant gradient and over a distance correspond to more than one minute of flight, the free-travel distance being free of potential conflicts with the terrain.