Abstract: In some embodiments, an archery bow riser comprises a body defining a first end, a second end and a grip portion. The body defines a shooting axis and comprises a first portion and a second portion. The first portion comprises a metal and the second portion comprises carbon fibers. The first portion extends to a first side of the shooting axis and to a second side of the shooting axis, and the second portion extends to the first side of the shooting axis and to the second side of the shooting axis.

Abstract: In some embodiments, a crossbow trigger mechanism comprises a housing, a trigger, a latch and a latch retaining mechanism. The housing defines a slot. The latch comprises a string catch and a trigger engaging portion. The latch is moveable with respect to the housing between first and second positions. In the first position, the trigger engaging portion contacts the trigger. In the second position, the trigger engaging portion does not contact the trigger. The latch retaining mechanism is arranged to retain the latch in the second position.

Abstract: The present disclosure provides an improved concealed carry clip, that attaches with machine screws to the slide rear cover plate, and which has friction features on the clip to facilitate drawing back the slide with the thumb and index finger. In addition, the cover plate can be equipped with projections that reduce shearing forces on the machine screws. A drilled and tapped replacement rear cover plate is provided with the improved concealed carry clip. Though the improved concealed carry clips have, to date, been designed for Glock®, M&P® and Springfield Armory® XD handguns, the concealed carry clips may be adapted for use on other similarly constructed handguns in the future.

Abstract: A retention block, mounted within a handgun receiving, holster shell cavity automatically locks a handgun therein upon its insertion into the holster cavity. An access passage is formed through a first sidewall of the holster shell. The retention block is mounted inside the holster cavity, selectively moveable from the locked position to an unlocked position by a retention-block release lever that is oriented on the outer surface of the first sidewall of the holster shell and coupled to the retention block through the access passage. A retention-block biasing element is coupled to the retention block, for biasing the retention block into the locked position.

Abstract: The inventive disclosures pertain to an improved handgun (and related retrofit/after-market kits) that incorporates an improved gunsight and ergonomically enhanced pistol-grip member. In embodiments, an elongated gunsight-augmentation member is adapted to be inserted between a handgun's existing rear and front gunsights such that the gunsight has been basically transformed into a barrel-length U-shaped channel that makes it clear to a user how to line-up a target, while ensuring that the entire length of the device has a smooth shape and edges to significantly reduce snagging when drawing the firearm. The gunsight-augmentation member can also incorporate an internal fiber-optic rod as a visual aid to line-up a firearm. In variations, the improved handgun incorporates an ergonomically enhanced finger-receiving member disposed at the bottom surface of the pistol-grip and/or magazine that is especially useful for compact handgun designs.

Abstract: Systems, devices, and methods for mounting front and rear IR and visible LEDs sights on weapons. The LEDs illuminate the sights in low light environments unlike modern day iron sights. The LED sights allow a shooter the ability to see both sights, and acquire the sights in low light without projecting any visible light. The sights being battery powered with an on/off and dimmer switch giving the shooter ability to use the sights at their convenience without projecting light.

Abstract: A three axis adjustable arrow rest preferably includes a front bracket, a bow mounting bracket, a pair of guide rods, a linear carriage, a lateral carriage and an arrow support frame. One end of the pair of guide rods are retained in the front bracket. The linear carriage is adjustably retained on the pair of guide rods. An opposing end of the pair of guide rods are retained by the bow mounting bracket. The lateral carriage is adjustable retained by the linear carriage. A vertical stem is adjustably retained in the lateral carriage. The arrow support frame is attached to a top of the vertical stem. The arrow support frame supports an arrow shaft. A bubble level may be included as an integral portion of a scope. A bubble level cap may be retained on end of the scope.

Abstract: A picatinny interface is configured to removably attach to a picatinny rail on a firearm while simultaneously statically supporting an electronic device which the user can easily view while operating the firearm. The picatinny interface includes a locking clamp, locking bolt, springs, and a universal picatinny rail mount which enables the picatinny interface to removably attach to the firearm's picatinny rail. A cam lever having an engage position and disengage position is implemented to enable the user to removably engage the picatinny interface with the picatinny rail. A safety lock is used with the cam lever to prevent the cam lever from inadvertently disengaging during firearm use. The picatinny interface includes a spring-loaded x-grip in which the electronic device is placed and supported. When assembled, the user can easily view an application, such as a ballistic calculator, on the electronic device while operating the firearm.

Abstract: A reactive armour module and method for providing protection against a tandem warhead, the tandem warhead providing a primary explosion followed after a small preset delay by a main explosion, the method comprising detecting the primary explosion, and detonating a directed blast, towards the end of the small preset delay, that disrupts the secondary explosion.

Abstract: The disclosure relates to a charge container device, said charge container device having a volume suitable to substantially fill a barrel chamber, said charge container device is formed from a substantially rigid and combustible material, wherein said charge container device comprises at least one wall to define a cavity for the retention of at least one cartridge case, said at least one cartridge case comprising an energetic material, wherein said at least one cartridge case is arranged in a stacked formation within said charge container, the charge container device further comprising a base portion and a top portion, wherein the top portion comprises an aperture to allow for expulsion of energy and the base portion comprising an ignition means.

Abstract: A broadhead for an arrow has improved opening characteristics and an adjustable cut span such that an archer may adjust cutting span of the main cutting blades of the broadhead to balance penetration with cut width. That is, cut width may be reduced to increase penetration depending on the type of target the archer or hunter is faced with. The arrow includes a collar threaded on the main body of the broadhead to limit the rearward travel of the main cutting blades as they pivot open from the main body of the broadhead upon impact with a target, such that moving the collar by rotating it about the main body adjusts the angle and cut width of the main cutting blades in their deployed position. The broadhead further includes forward cutting surfaces on the main blades configured to open the blades upon impact with the target.

Abstract: An arrow head having two different movable blades with at least one blade interchangeably mounted in a pivotal or a fixed position with respect to a blade carrying body and a second blade that moves between a flight position and an impact position. A shaft is used to retain a corresponding blade in a pivotal or a fixed position with respect to a blade carrying body. When the blade is pivotally mounted, a bias force of a retaining member is preferably selected so that each blade remains in a normally closed position during flight of the arrow head and can quickly move to a fully open position upon impact or when a sufficient opening force is applied to the arrow head.

Abstract: A shot shell includes a cartridge (also referred herein as a ‘hull’), a primer, gunpowder, a tungsten propulsion system wadding, shot pellets having a first size, and shot pellets having a second size that is larger than the first size, and a 5-8 star crimp on an upper portion of the plastic cartridge. It has been found that there are advantages to loading smaller shot (preferably 3 shot or 4 shot) first, and then loading larger shot (preferably 1 shot or 2 shot) so that the larger shot leaves the cartridge first when the shot shell is fired. In a preferred embodiment, the cartridge contains 40% to 60% large shot, and the remainder of shot pellets in the cartridge is smaller shot. In an alternate embodiment, the large shot may be loaded first, and the smaller shot loaded last, so that the smaller shot leaves the shot shell first.

Abstract: A method is provided of generating a course-correction signal for a spin-stabilized projectile. The method includes capturing a time-sequence of images of a scene at a frame rate, comparing respective current images of the time-sequence of images to a corresponding previous image of the time-sequence of images, determining a rotation angle between the current and previous images, rotating the images using the rotation angle, identifying a target in the rotated images, generating target bearing angles to cause the projectile to correct its course toward the target using the target bearing angles, and adjusting the target bearing angles to compensate for the rotation of the images.

Abstract: Provided is an ammunition case roll sizing apparatus 10 which comprises a base 12 which typically defines a surface 14 along with a case receptacle 16 proximate the surface 14. The base 12 also includes a former 18 protruding from a boundary of the surface 14. The apparatus 10 further comprises a circular disk 20 which is rotatably flat mounted onto the surface 14 of the base 12 so that a case channel 22 is complementarily defined between the disk 20 and the former 18. The disk 20 is operatively rotatable via a rotational actuator 24. Also included is a case feeder 26 configured for operatively receiving a plurality of cases 28 and for feeding a case lengthwise into the case receptacle 16 of the base. Further included is a case pusher 30 which is configured to be operatively actuatable by the rotating disk 20 in order to push a case 28 from the case receptacle 16 into the channel 22 to roll-size the case.

Abstract: The present disclosure provides a high explosive firing mechanism. The high explosive firing mechanism may comprise a housing comprising a firing pin tube having a primer inlet. The high explosive firing mechanism may further comprise a firing pin disposed within the firing pin tube, the firing pin comprising a nub. The nub may partially extend into the primer inlet.

Abstract: A device produces an arming criterion for a fuze for a partly spinning munition. The munition has a first part which spins and a second part without or with little spin during flight of the munition. The device includes a sensor for outputting a characteristic variable for a relative rotation between the first part and the second part and a control unit for producing the arming criterion when the characteristic variable fulfils a flying criterion. The fuze for the partly spinning munition, which has at least one arming criterion, includes the device for providing the arming criterion or one of the arming criteria. The partly spinning munition includes the fuze with the device.

Abstract: A plurality of detonators (22A-N) and a method of assigning a unique identifier to each of the detonators comprises connecting the detonators in parallel to one another at respective connection points on each of two signal-transmitting conductors of a harness which extends from a reference location to a plurality of boreholes in which the detonators are respectively positioned. The method includes measuring a parameter which varies with the lengths of the two conductors between the reference location and the respective two connection points, and generating a unique identifier for each respective detonator based on the measured parameter. The detonators include a memory unit (58), a voltage-controlled oscillator (60, 60P) which generates a signal at an output frequency determined by voltage applied to the two connection points, and a processor (50) which uses the output frequency to generate a unique identifier for the detonator, which identifier is transferred to the memory unit (58).

Abstract: Systems for automatedly delivering explosives with variable densities are disclosed herein. Methods of automatedly delivering explosives with variable densities are disclosed herein. Methods of determining an emulsion explosive density profile are disclosed herein.

Abstract: A single-tool step gauge provides for measuring or setting a preferred or desired height of a string above a surface of a stringed musical instrument, and includes a nut slot gauge, crown height gauge and string action gauge. The nut slot gauge includes a downwardly-extending tab, a first plurality of integrally-formed graduated length gauges that measure a nut slot height, and a first plurality of measurement indications corresponding to the first plurality of graduated length gauges. The crown height gauge includes a pair of feet, a second plurality of integrally-formed graduated length gauges that measure a fret crown height, and a second plurality of measurement indications corresponding to the second plurality of graduated length gauges. The string action gauge includes a base, a third plurality of graduated length gauges that measure a string action, and a third plurality of measurement indications corresponding to the third plurality of graduated length gauges.

Abstract: A method for capturing dynamic vibrations of a roughness sensor of a roughness measuring apparatus is provided. The movement of the roughness sensor relative to the roughness measuring apparatus and/or relative to a surface of a workpiece is captured by a measuring system in the frequency range below 100 Hz with a data capturing rate of greater than 100 Hz. The captured data of the relative movement are made available for further data processing in and/or stored. Moreover, a method for measuring the roughness of a workpiece surface is provided, in which the method for capturing the dynamic vibrations of a roughness sensor is used. In addition, a computer program product for controlling a roughness sensor of a roughness measuring apparatus in accordance with one of the methods is provided, and a roughness measuring device that is configured to carry out one of the methods.

Abstract: Methods and apparatus for s sensor having magnetic field sensing elements coupled in a differential bridge and a signal processor configured to receive signals from the bridge to determine a distance from the magnetic field sensing elements to a magnet from flux line divergence of magnetic flux generated by the magnet.

Abstract: A wireless passive strain sensor is provided. The wireless passive strain sensor includes an outer coil holder, a reading inductance coil, a capacitance patch, an inner coil holder, and a sensing inductance coil. A shaft penetrates through the outer coil holder. The reading inductance coil is disposed on the outer coil holder. The capacitance patch is disposed on the shaft. The inner coil holder is disposed inside the outer coil holder. The inner coil holder is disposed on the shaft. The sensing inductance coil is disposed on the inner coil holder. The sensing inductance coil is electrically connected to the capacitance patch.

Abstract: A multi-beam optical phased array on a single planar waveguide layer or a small number of planar waveguide layers enables building an optical sensor that performs much like a significantly larger telescope. Imaging systems use planar waveguides created using micro-lithographic techniques. These imagers are variants of “phased arrays,” common and familiar from microwave radar applications. However, there are significant differences when these same concepts are applied to visible and infrared light.

Abstract: A optical target assembly is disclosed herein. The optical target assembly is movable about orthogonal pitch, yaw and roll axes and includes a reflector, a pitch and yaw angular sensor assembly, and a roll sensor assembly. The reflector is configured to engage a source of laser light. The pitch and yaw angular sensor includes a laser light sensor and an angle detection sensor. The pitch and yaw angular sensor assembly is configured to measure 360 degrees of motion about the pitch and the yaw axes. The roll sensor assembly is configured to measure 360 degrees of motion about the roll axis. The reflector can include an aperture configured to permit a portion of laser light incident on the reflector to pass through the reflector and onto the laser light sensor. The roll sensor assembly can include a roll angle sensor and a roll level sensor coupled to a two-dimensional pendulum.

Abstract: To provide a three-dimensional coordinate measuring device capable of performing highly reliable shape measurement at high accuracy without complicated calibration work. A motorized rotation stage is rotatably supported with respect to a reference base. A reference camera is fixed to the reference base, the reference camera captures an image of a plurality of reference markers provided on the motorized rotation stage. At the time of calibration, a plurality of markers of the reference member are captured at respective different postures of the motorized rotation stage. New camera parameters are calculated based on a plurality of reference images and reference marker information indicating the arrangement of the plurality of markers and then the camera parameters in the main body memory are updated to the new camera parameters.

Abstract: In a method and device for measuring a height of an agricultural product above ground using a mobile communications device, the method includes positioning the communications device above the agricultural product and determining a distance between the communications device and the agricultural product using a built-in sensor of the communications device. The height of the agricultural product is determined on the basis of the determined distance.

Abstract: A three-dimensional measuring device includes a human detection information receiver for receiving information from a human detection sensor that detects a person present within a detection range, a laser emitter for irradiating a region including the object with the laser beam, a laser emission controller for controlling power of the laser beam irradiated from the laser emitter to first power and second power lower than the first power, an image capturing device for imaging the object, on which the laser beam is irradiated, and acquiring image data, and a point-group-data generator for generating, based on the image data, three-dimensional point group data of a region including the object. When the human detection information receiver receives, from the human detection sensor, first information indicating that a person is absent from the detection range, the laser emission controller controls the power of the laser beam to the first power.

Abstract: A device for adjusting the setting of and/or for measuring a tool includes a measuring element carrier which can move along a first axis (x-axis), and along a second axis (z-axis) that extends at right angles to the first axis, on which measuring element carrier a measuring element for the optical measurement of the tool is disposed. To facilitate the adjusting and measuring process, a reference body, which is able to move between a standby position and a measuring position on the tool, is disposed on the measuring element carrier for interaction with the measuring element.

Abstract: A laser shearography testing system for non-destructively testing a component includes a component heating sub-system coupled to the component. The component heating sub-system excites the component into a loaded state by passing an electric current through the component. A resistivity of the component causes the component to internally and uniformly heat as the electric current passes through the component.

Abstract: A hand-held device for obtaining a three-dimensional topological surface profile of a tyre, the device comprising: a base comprising an aperture; a light source arranged in use to generate an elongate pattern of light, and to project said pattern through the aperture onto a rolling surface of the tyre; a detector arranged to image a region of the rolling surface of the tyre; a plurality of pairs of guide wheels mounted on respective axles mounted on the base, wherein the guide wheels on adjacent axles are linked by gears; and a rotary encoder arranged to generate a signal corresponding to rotation of an axle.

Abstract: An integrated optical assembly is provided, with enhancements that are particularly useful when the integrated optical assembly forms part of a laser radar system. The integrated optical assembly produces a reference beam that is related to the optical characteristics of a scanning reflector, or to changes in position or orientation of the scanning reflector relative to a source. Thus, if the scanning reflector orientation were to shift from its intended orientation (due e.g. to thermal expansion) or if characteristics of the scanning reflector (e.g. the index of refraction of the scanning reflector) were to change on account of temperature changes, the reference beam can be used to provide data that can be used to account for such changes. In addition, if the scanning reflector were to be positioned in an orientation other than the orientation desired, the reference beam can be used in identifying and correcting that positioning.

Abstract: A surface flatness measuring device and a surface flatness measuring method are disclosed. By non-contacting laser measurement, measurement precision can reach 0.001 mm so the measurement precision is high. A repetitive measurement error thereof can be controlled to be within 3 um so the measurement error is tiny, which prevent issues of low measurement precision and great measurement errors due to manual measurement in prior art. At the same time, the present invention measurement data can be automatically recorded and saved, measurement for a large batch of boards under measurement can be implemented, which prevents the issues of the conventional measurement data requiring manual recording and lacking capability of uploading the measurement data.

Abstract: Apparatus for structured light scanning. The structured light includes one or more projected lines or other patterns. At least two independent emitters emit light for each projected line or pattern. Typically the at least two independent emitters are arranged in a row. The apparatus also includes a pattern generator for causing light from respective emitters of a given row to overlap along a pattern axis to form a projected pattern.

Abstract: The present invention discloses a laser measurement system and method for measuring a six-degree-of-freedom geometric error of a rotating shaft.

Abstract: Provided is an angle detection system including: a target unit including a reflection target and an encoder pattern showing an angle of the target unit; and a surveying instrument including a survey unit configured to measure a distance and angle to the reflection target, an encoder pattern reading unit configured to read a bit pattern of the encoder pattern from an image of the encoder pattern, a display unit, and an arithmetic control unit. The surveying instrument includes at least one imaging unit changeable in focal length, and is configured to calculate a distance and angle to the reflection target, to set an imaging magnification of the imaging unit, to set a cutout region of the encoder pattern by using the image displayed on the display unit, to determine success of identification of the encoder pattern and, in the case of success, to calculate an encoder pattern read angle.

Abstract: According to one embodiment, a substrate measurement method comprises irradiating a substrate with an electromagnetic wave, such as an X-ray, at a plurality of incident azimuth angles with respect to an orientation of a repetitive array on the substrate. The irradiating conditions are varied in different incident azimuth angle ranges. The repetitive array comprises a pattern feature, such as a hole or a pillar, for example. The scattering intensity of the electromagnetic waves scattered from the substrate is measured at each of the different incident azimuth angles. Shape information for the pattern feature in the is calculated based on the measured scattering intensity of the electromagnetic waves at the plurality of incident azimuth angles.

Abstract: The present disclosure provides a method and a system for determining locations of telecommunication ground stations. In one aspect, the method includes creating heat map data set representing air traffic volume at grid units of a geographic region, determining a ground station location at one of the grid units having air traffic volume greater than that of others of the grid units, modifying the heat map data by excluding data representing one or more of the grid units surrounding the ground station location, and repeating the determining and modifying steps until a predetermined quantity of ground station locations is determined.

Abstract: A measuring device for measuring an object. The measuring device includes a distance measuring unit having a beam emission unit generating a measurement radiation having a defined wavelength spectrum and a detector detecting the measurement radiation reflected on the object surface, the detector having at least one first sensor. The distance measuring unit generates distance measured data and reflection measured data as first distance measured data by emitting the measurement radiation and detecting the reflected measurement radiation according to the principle of triangulation. The measurement radiation is generated using a wavelength spectrum such that a fluorescence is excitable by an interaction of the measurement radiation with the object material to emit fluorescent light, wherein a spectrum of the fluorescent light and the wavelength spectrum of the measurement radiation are different.

Abstract: Apparatus and associated methods relate to determining altitude of an aircraft during flight based on properties of vortex shedding. A vortex-shedding projection is projected into the airstream adjacent to the exterior surface of the aircraft so as to cause vortex-shedding turbulence of the airstream. One or more downstream sound-pressure detectors, which are attached to the exterior surface of the aircraft downstream from the vortex-shedding projection, detect(s) a vortex-shedding frequency f of the vortex-shedding turbulence caused by the vortex-shedding projection. A processor determines the altitude of the aircraft based, at least in part, on the vortex-shedding frequency f of the vortex-shedding turbulence as detected by the one or more downstream sound-pressure detectors.

Abstract: Aspects of the subject technology relate to electronic devices with pressure sensors. A pressure sensor may be mounted within a device housing in a pressure sensor cavity at or near an opening in the housing. A barometric vent between a main cavity within the housing and the pressure sensor cavity allows pressure changes in the main cavity to generate airflow through the pressure sensor cavity and out through the opening in the device housing. The generated airflow may clear debris that has occluded the opening in the housing.

Abstract: A vehicle computing system performs enhances relatively sparse data collected by a LiDAR sensor by increasing the density of points in certain portions of the scan. For instance, the system generates 3D triangles based on a point cloud collected by the LiDAR sensor and filters the 3D triangles to identify a subset of 3D triangles that are proximate to the ground. The system interpolates points within the subset of 3D triangles to identify additional points on the ground. As another example, the system uses data collected by the LiDAR sensor to identify vertical structures and interpolate additional points on those vertical structures. The enhanced data can be used for a variety of applications related to autonomous vehicle navigation and HD map generation, such as detecting lane markings on the road in front of the vehicle or determining a change in the vehicle's position and orientation.

Abstract: The present invention relates to a calibration method of magnetic sensors, for removing from the measurements the so-called “bias” and obtaining the actual measurement of the magnetic field. This method, in addition to measurements of such magnetic sensors, uses measurements of angular rotation sensors available in various types of commercial devices including smartphones. The present invention also relates to a corresponding system for determining the instantaneous real time orientation and/or position of a mobile device with respect to a magnetic field.

Abstract: A method, for providing spatial stability and electrical power with a hybrid power source and control moment gyroscope (HPCMG), includes producing spatial stability force for the HPCMG by spinning a central mass within a first transverse gimbal assembly about a first axis of rotation of a control moment gyroscope (CMG). The CMG includes the first transverse gimbal assembly, the central mass, and a second gimbal assembly rotationally connected to the first transverse gimbal assembly. The first transverse gimbal assembly is rotationally connected to the central mass at a first position of the first transverse gimbal assembly and at a second position of the first transverse gimbal assembly along the first axis of rotation. The method includes producing a voltage potential with the central mass. The method includes charging or discharging the central mass through conductive bearings.

Abstract: A method for operating a micromechanical component (a rotation rate sensor), in which a first AC electrical voltage, having a first frequency, is applied to a drive-electrode so that an oscillation apparatus is deflected parallel to a deflection direction by the drive-electrode; a second AC electrical voltage, having a second frequency, is applied to a detection-electrode so that a force effect on the oscillation apparatus perpendicularly to the detection direction is detected by the drive-electrode, a third AC electrical voltage, having a third frequency differing from the first, is applied to the drive-electrode so that a deflection of the oscillation apparatus parallel to the deflection direction is detected by the drive-electrode; and/or that a fourth AC electrical voltage, having a fourth frequency differing from the second, is applied to the detection-electrode to exert a further force effect, opposite to the force effect, on the oscillation apparatus.

Abstract: The invention relates to a device for maintaining the attitude of a carrier, the device comprising three primary gyroscopes (1, 2, 3) that are arranged to measure primary speeds of rotation (Rbc) of a carrier about three primary axes, a secondary gyroscope (4) that is arranged to measure a secondary speed of rotation (Rhp) of the carrier about a secondary axis that is different from each of the primary axes, a video camera (5) having an optical axis that is different from each of the primary axes, and a data processing module (6) that is configured to estimate scale-factor and drill errors that corrupt the primary speeds of rotation (Rbc) using data issued from the secondary speed of rotation (Rhp) and images acquired by the video camera (5), and to correct the primary speeds of rotation with said estimated errors.

Abstract: A method for operating a fiber optic gyroscope to measure angular velocity uses a closed-loop modulation scheme. Two-state modulation voltages are applied to an optical modulator and continuously adjusted to maintain a null difference between corresponding demodulated voltages from a photodetector. If one of the modulation voltages reaches a threshold voltage, the continuous nulling adjustment is interrupted briefly while the two-state modulation voltages are reset to values that correspond to relative phases of ?/2 and ??/2 when the gyroscope is stationary, then the continuous adjustment is resumed. This reoccurring resetting, while the gyroscope accelerates or decelerates, substantially increases the dynamic range over which the gyroscope can precisely measure angular velocity.

Abstract: A method comprises receiving a first optical signal and a second optical signal at or near an optical resonator, where the first optical signal includes a clockwise (CW) optical signal and the second optical signal includes a counter clockwise optical signal; injecting the first optical signal and the second optical signal into a resonator loop closure optics system of the optical resonator; sampling a portion of the first optical signal and a portion of the second optical signal; combining the portion of the first optical signal and the second optical signal; converting the combined optical signals to an analog electrical signal; digitizing the analog electrical signal; storing an estimated frequency of a beat signal created by a combination of the CW optical signal and the CCW optical signal; and using the stored estimated beat signal frequency, digitally phase lock to a frequency of the beat signal.

Abstract: Techniques are disclosed for systems and methods for navigating mobile structures. The mobile structure may include a main attitude & heading reference system (AHRS) and one or more devices. The one or more devices may include a slave AHRS such as a gyroscope. Data may be transmitted from the main AHRS to the one or more devices through a network. Latency may be present in the transmission of data. As such, data from the slave AHRS may be used to determine changes in heading and/or attitude of the mobile structure to compensate for such latency. In addition, such data may be used to determine changes in wind direction and/or heading experienced by the mobile structure.

Abstract: Examples are disclosed that relate to providing information regarding nearby locations that may be familiar to a user to help inform the user of a current location within an area. One disclosed example provides a computing device comprising a display, a logic subsystem, and a storage subsystem comprising instructions executable by the logic subsystem to form a list of familiar locations for a user based upon a user history regarding the familiar locations, determine that the user is within a threshold proximity to a nearby familiar location on the list of familiar locations, and in response, output directional information indicating a relative position of the nearby familiar location on the list of familiar locations.