Abstract: An arrow rest arrangement in a capture style arrow rest for an archery bow. The arrow capture portion may be formed as an inverted brush. The arrow capture portion defines a central aperture through which an arrow shaft extends. The aperture may include two straight slanted lower side portions forming a “V” profile to support the arrow.

Abstract: An arrow rest mounting system is disclosed. The system, in an embodiment, includes a body configured to be coupled to an archery bow and an arm configured to be moveably coupled to the body. The arm includes an arrow rest support. The arm is configured to cooperate with the body to enable the arm to be slid relative to the body.

Abstract: A stock for a weapon, such as a crossbow stock, that includes one or more central dampeners, such as first, second, and third central dampeners, and/or one or more component dampeners, such as first, second, and third component dampeners, that function to reduce vibrations transmitted through the stock as a result of weapon firing. The central and/or component dampeners may be positioned in the stock's foregrip section, pistol grip section, crank cocking device section, thumb grip section, rearward end section, and cheek rest section.

Abstract: The disclosed technology is directed to a stabilizing bow stand for use with a bow having a bow riser, wherein the stand may be secured either to the bow riser or to the end of a stabilizer affixed to the bow riser. The stabilizing bow stand of the disclosed technology includes a mounting bracket having a support element and one or more legs independently and pivotally affixed at the proximal end of the leg(s) to the mounting bracket. The support element has a mounting hole to receive fastening means to facilitate mounting of the bracket to the bow or to the end of a stabilizer mounted on the bow.

Abstract: A magazine gas heating structure includes a magazine body, an electricity supply device arranged in the magazine body, a heating assembly arranged in the magazine body and electrically connected with the electricity supply device, a liquid channel defined in the magazine body, and a turbulence thermal conduction element arranged in the magazine body and connected to the heating assembly. The turbulence thermal conduction element is arranged at an end of the liquid channel. As such, a user may set the magazine body into a toy gun to allow the electricity supply device to supply electrical energy to the heating assembly, so that the heating assembly heats the turbulence thermal conduction element. Pressurized fluid is conducted to pass through the turbulence thermal conduction element and efficiently absorb thermal energy from the turbulence thermal conduction element so that the pressurized fluid is converted into gas for firing the toy gun.

Abstract: Safety device (100) per nails (101), said device (100) being characterized in that it comprises a sheet (103) in resistant material, developing principally along a first and a second axis (X, Y), suitable for being installed over of a nail of a person and below of a fake nail (102), said sheet (103) in resistant material comprising in an its first end cutting and/or pointed means (104; 104a, 104b, 104c) susceptible of realizing a receptacle where containing portions of skin of an aggressor.

Abstract: A firearm includes a receiver, a forearm pivotally attached to a distal end of the receiver, and a barrel having a barrel extension. A proximal end of the barrel and the barrel extension are secured within the forearm such that the barrel and barrel extension are laterally pivotable with the forearm relative to the receiver between a first assembled position and a second folded position. The forearm, barrel, and barrel extension may be secured to the receiver in the first assembled position for use of the firearm, after which the firearm may be folded for storage and/or transportation.

Abstract: Embodiments of the disclosure are directed to a rapid adjust buckle for a rifle sling. The buckle can include a main buckle portion with a pair of side portions and a handle portion extending between the pair of side portions and over the main buckle portion to define a handle aperture. In various embodiments the handle portion and the main buckle portion are a unitary piece composed of a polymer material with the handle portion being flexibly biased towards an uncompressed open shape such that the handle portion is configured to compress against the main buckle portion in response to a compressing force but return to the uncompressed open shape when the compressing force is relieved. In one or more embodiments the handle portion includes a plurality of jointed connection points configured to flatten the profile of the handle portion when the handle portion is exposed to the compressing force.

Abstract: A system for correcting the aim of a weapon which is operative to launch a projectile from a barrel on a ballistic path toward a target. A rear surface of the projectile is coated with a fluorescent dye that re-emits radiation when excited by laser radiation. The system includes a source of laser radiation (strobe) pulses that form a cone of light intersecting the ballistic path of the projectile. The strobe pulses are emitted at predetermined times (T1, T2, T3, . . . Tn) following firing of the projectile (at time T0). An optical detector receives the radiation re-emitted by a the fluorescent dye at the rear of the projectile at times (T1z, T2z, T3z, . . . Tnz) producing measurable location signals allowing the system to measure the vertical and lateral positions of the projectile at said times, where “z” is a re-emission delay and T1z, T2z, T3z, . . . Tnz are the respective times T1, T2, T3, . . . Tn each delayed by amount z.

Abstract: A ballistic resistant armor plate assembly includes an armor plate which includes a strike side and a back side and a solid foam material positioned in overlying relationship with respect to the strike side and the back side of the armor plate.

Abstract: The various embodiments herein provide a portable modular target stand comprising a primary stabilization rail, a secondary stabilization rail, and a plurality of leg receiving brackets. The primary stabilization rail forms a base for a plurality of accessories and a plurality of target structure. The secondary stabilization rail is housed within the primary stabilization rail. The plurality of leg receiving brackets are connected on the proximal ends of the primary stabilization rail. Each leg receiving bracket is attached with a leg fixed on a ground surface through a fixing mechanism.

Abstract: The present invention is directed to a hit-scoring apparatus for shooting practice. It is also directed to a hit-scoring target panel for shooting practice.

Abstract: A rock-breaking cartridge (10) includes a casing (16) of deformable material that forms an internal cavity (22) and a tapered part (82). A seal (90) extends around the outside of the tapered part (82) and a piston (92) inside the cavity (22) butts against the inside of the tapered part (82) to seal against the inside of the casing (16). A charge (46) is provided inside the cavity (22) on the side of the piston (92) that is opposite from a narrow end of the tapered part (82) and when the charge (46) is ignited, it causes the piston (92) to slide towards the narrow end and to force the tapered part (82) and seal (90) to expand. The expansion causes the seal (90) to seal against the inside of a hole in which the cartridge (10) has been placed and the seal (90), tapered part (82) and piston (92) form a sturdy plug to contain gasses generated by detonation of the charge (46).

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical insert includes a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface.

Abstract: One embodiment of the present invention provides a method of making a polymeric ammunition cartridge having wicking texturing about the projectile aperture.

Abstract: A threaded member has a discontinuous helical thread ridge 15 on which a plurality of dividing portions 14 are formed in the middle. At least one of the discontinuous portions of the thread ridge 15, which is interposed between the dividing portions 14, is a locking portion 18 which is configured such that a flank angle of one flank, out of flanks on both sides of the thread ridge 15, is smaller than a flank angle of a flank corresponding to a basic ridge profile and at least part of the flank is disposed on an outside of the flank corresponding to the basic ridge profile.

Abstract: Arrowheads can include blades which remain deployed to a maximum cutting diameter on contact with soft media and deflect on contact with hard media in a target.

Abstract: A weighted body adapted for insertion into an existing gun magazine shell approximates the weight and/or density of live ammunition cartridges. The size and shape of the body allows for insertion down and into the slot at the top on the magazine, pressing down on the spring, with a sliding retainer stop or other feature to maintain the weight in position, filling or partially filling the internal volume of the magazine with the weight. The integral slide retainer stop attached at the top of the device is then moved or slid by the operator into a position that locks the weight into the magazine so it cannot pop back out due to spring pressure and will not interfere with other workings of the gun slide or receiver. A plurality of color-coded stops may be provided for use with the same or different weighted bodies corresponding to different calibers of ammunition.

Abstract: Warhead (1) comprising a tubular structure comprising: a front end (15) and a front region (2) adjoining the front end (15); a rear end (14) and a rear region (3) adjoining the rear end (14); a central axis (11) connecting the front end (15) and the rear end (14); a wall portion (4); and a central cavity (6), whereby the outer wall portion (4) tapers in the front region (2) and comprises fragments (7; 9) in the rear region (3) and the tubular structure in the rear region (3) comprises a generally cylindrical portion (12) and a generally conical portion (13) relative to the central axis

Abstract: Fragmentation sleeve (1), for a generally circular cylindrically shaped ammunition body (2), whereby the sleeve (1) has an annular shape with an inner diameter at no place smaller than the outer diameter of the ammunition body (2), an outer diameter Da, an internal surface Si. an external surface Sa, and a height H, the sleeve is configured to be slid over and positioned on an outer surface (3) of the ammunition body (2) and comprises a plurality of fragments (4) embedded in a polymeric matrix (5).

Abstract: The present invention discloses an ammunition device or pellet suitable for use with gas fired guns, such as paintballing guns. The pellets have a body and a charge that are arranged as a single unit of formed as separate parts which are assembled for use. The body can be single use or reusable. The charge contains marking material and is a single-use portion arranged to be adjacent to the body.

Abstract: In Prior Art, there is no System, Process, or Machinery To Receive Incoming Nuclear Weapons, Missiles or Other like Devices, or Disarm Them, or Cut Them, Relocate or Send Back To Point Of Origin. This Invention creates A System, Process, Improvement, Apparatus, Machinery To Receive Incoming Nuclear Weapons, Missiles, or Other Devices, or Expand, or Disarm, Or Cut, Sever, Rip, Tear Apart Nuclear Weapons, Missiles, Chemical or Biological Devices, Reduce Size, or Relocate Them, or Send them back to Nation Of Origin. This Antinuclear Receiving, Cutting, Disarming, Relocating System can Be Attached to Movable Vehicles, Trucks, Cars, Automobiles, Planes, Trains, Ships, Submarines, Rockets, Subways, Buses etc. To Operate on Land, Air, Sea, Space, Underwater, Underground etc. It invents An Expanding Shield that can Shelter Humans To Deter, and Protect against Nuclear Weapons. By Cutting, Disarming, Relocating Nuclear Weapons will make Nuclear Weapons Obsolete, and Save The World From Nuclear Destruction.

Abstract: A precision case holder engages the extraction groove of the rim of a straight wall case and established a fixed distance between a base of the case and a precision forward surface of the holder. The case may then be inserted into a case trimmer and the holder establishes a repeatable distance between the base of the case and a cutting tool in the case trimmer. The holder includes a tapered slot with edges which engage the extraction groove and a threaded piston which is tightened against the base of the case. The case slides into the tapered slot until the taper resists further sliding, and the piston is tightened to retain the case.

Abstract: The present invention provides ammunition cartridge having a two piece primer insert with a flange, a polymeric middle body extending from the primer insert to a cylindrical middle body coupling region, and a polymeric projectile end having a projectile aperture mated to the polymeric middle body.

Abstract: The present invention provides a polymeric ammunition cartridge comprising: a three piece primer insert; a substantially cylindrical polymeric middle body extending about the three piece primer insert, wherein the substantially cylindrical polymeric middle body comprises: a substantially cylindrical polymeric bullet-end coupling element at a first end of the substantially cylindrical polymeric middle body opposite a substantially cylindrical polymeric coupling end connected by a powder chamber, wherein the substantially cylindrical polymeric coupling end extends over the substantially cylindrical coupling element and covers an circumferential surface of the primer flash hole aperture; and a substantially cylindrical polymeric bullet-end upper portion comprising a bullet-end coupling element connected to the substantially cylindrical polymeric bullet-end coupling element opposite a projectile aperture adapted to engage a bullet.

Abstract: The invention relates to a ground milling machine, comprising: a machine frame supported by front and rear travel units and at least partially height-adjustable; a milling drum housing arranged on the machine frame, comprising a milling drum that is rotatable about a horizontal axis of rotation perpendicular to the milling direction; a retaining device arranged in front of the milling drum housing in the milling direction with an adjustment device that enables the height adjustment of the retaining device in relation to the milling drum housing and the machine frame; and a ground contact device arranged in front of the milling drum housing in the milling direction with a contact runner and a mounting lever. The contact runner is adjustable in relation to the retaining device within a height-adjustment range and is mounted on the retaining device by way of the mounting lever.

Abstract: A straightness checking method includes the steps of standing a pin at each of both edge portions of linear members of a plurality of linearly-disposed components, and also standing a cut-out pin formed to have a cut-out on a part of a side face thereof, at an intermediate portion between the both edge portions, fixing one end portion and the other end portion of a line member respectively to the pins stood at the both edge portions, bringing into contact with the intermediate portion of the line member an uncut side face part corresponding to a side face without the cut-out formed of the cut-out pin, and rotating the cut-out pin and checking whether or not the line member vibrates due to rotation of the cut-out pin.

Abstract: Disclosed is a wheel flange planeness detection device, comprising a frame, a lifting cylinder, a lifting platform, guide posts, a support frame, a servo motor, a bearing seat, a shaft, a bearing, a rotating platform, guide rails, a sliding block, a small chain wheel, a large chain wheel, a clamping cylinder, a chain wheel driving motor, a left sliding plate, rotating shafts, rotating wheels, a visual sensor, clamping guide rails, gear rack structures, a right sliding plate, intelligent dial indicators, a support plate, a linear motor and a motor support. The device may monitor the state of flange planeness in an automatic production line in real time; when the flange planeness is out of tolerance, the device may immediately give an alarm, and the technologist adjusts the machining process in time after receiving the alarm, thereby avoiding a large batch of rejects.

Abstract: A medical system tracks the position of a medical instrument within a body of a patient. The medical instrument includes an electromagnet structure having an inductor coil wound around a core. A control circuit applies a low frequency excitation signal across the inductor coil. The inductor coil and the core generate a magnetic field. A plurality of sensors sense parameters of the generated magnetic field and produce sensor signals. The control circuit calculates the position of the medical instrument based on the produced sensor signals.

Abstract: A system for inspecting a slab of material may include a polarization maintaining single mode optical-fiber, a linearly polarized broadband light-source configured to emit a polarized-light over the optical fiber, a beam-assembly configured to receive the light over the optical fiber and direct the light toward a slab of material; a polarization-rotator for controlling polarization of the light directed to the slab of material from the beam-assembly; a computer-controlled etalon filter configured to receive the light over the optical fiber, filter the light, and direct the light over the optical fiber; and a computer-controlled spectrometer configured to receive the light over the optical fiber after the light has been filtered by the etalon filter and after the light has been reflected from or transmitted through the slab of material and spectrally analyze the light.

Abstract: An optical coherence tomography (OCT) system for imaging a sample is provided. The OCT system includes an optical circuit and a digitization circuit. The optical circuit includes an interferometer and is configured to probe the sample and generate an analog OCT signal representative of the sample. The digitization circuit includes a frequency down converter and an analog-to-digital converter. The digitization circuit is configured to receive, down convert and digitize the analog OCT signal, thereby outputting a digitized down converted signal. A method for imaging a sample is also provided. The method includes steps of optically probing the sample to generate the analog OCT signal representative of the sample and processing the analog OCT signal to obtain the digitized down converted signal.

Abstract: A sensor comprising a light component in support of a light source operable to direct a beam of light onto an imaging device having an image sensor, such as a CCD or CMOS or N-type metal-oxide-semiconductor (NMOS or Live MOS) sensor. The sensor can also comprise an imaging device positioned proximate to the light component and operable to receive the beam of light, and to convert this into an electric signal, wherein the light component and the imaging device are movable relative to one another, and wherein relative movement of the light component and the imaging device is determinable in multiple degrees of freedom. The sensor can also comprise a light deflecting module designed to deflect light from a light component onto the imaging device. The light sources and the resulting beams of light therefrom can comprise a number of different types, orientations, configurations to facilitate different measurable and determinable degrees of freedom by the sensor.

Abstract: The invention relates to a method for electronically analyzing a time-variant signal (Ue(t)) having at least one extreme value, the amplitude and time of which are to be detected, by means of a detection circuit that operates as a peak value store and follows the time-variant signal after a threshold value (Us) is exceeded until the maximum amplitude is reached, wherein exceedance of the extreme value results in a peak indicator signal (Usi(t)) being generated and the maximum amplitude being stored, which is characterized in that to capture more than one extreme value in the time-variant signal, the tracking of the signal (Ue(t)) is deactivated after production of the first peak indicator signal and after a drop below the threshold value and, after the signal exceeds the threshold value again as time progresses, further tracking of the signal (Ue(t)) is activated until the next extreme value to be detected is reached and a further peak indicator signal (Usi(t)) is generated and this further maximum amplitude

Abstract: The present disclosure provides a film thickness test apparatus and method, and a vapor deposition device. The film thickness test apparatus is arranged for one process cavity, and the film thickness test apparatus comprises: a test assembly; a transport assembly configured to, when moving towards the process cavity, drive the test assembly into the process cavity so that the test assembly is vapor deposited in the process cavity to form a test film, and, when moving away from the process cavity, drive the test assembly out of the process cavity; and a drive assembly configured to drive the transport assembly to move along a direction towards/away from the process cavity.

Abstract: An optical measuring apparatus for magnifying displacement includes a seat, a movable abutting member, a plurality of static optical sensing elements and a dynamic optical sensing element. The seat includes a positioning groove. The movable abutting member is pivotally connected to the seat and corresponding to the positioning groove. An object is sandwiched between the movable abutting member and the positioning groove. The static optical sensing elements are disposed on the seat. The dynamic optical sensing element is disposed on the movable abutting member. There is an optical sensing distance between the dynamic optical sensing element and one of the static optical sensing elements. The dynamic optical sensing element is moved along an arc path by the movable abutting member so as to change the optical sensing distance, and a change of the optical sensing distance is greater than a change of a diameter of the object.

Abstract: A method of measuring a volume of a micro projection includes: measuring a three-dimensional shape of the micro projection using white-light interferometry; comparing a height at which a first peak of an envelope of an interference light intensity is detected with a height of a reference plane, and extracting a projection top portion of the micro projection; detecting a height of the extracted projection top portion; detecting a diameter based on a lateral dimension and a longitudinal dimension of a circumscribed quadrangle in an area that constitutes the projection top portion and a region having a height different from the height of the reference plane, the region including or being in contact with the projection top portion; and calculating the volume of the micro projection based on the height of the projection top portion and the diameter.

Abstract: A three-dimensional measurement device includes: an illuminator that irradiates a measured object with a predetermined light; an imaging device that comprises: an imaging sensor displaceable at least in a vertical direction; and a both-sided telecentric optical system that causes the imaging sensor to form an image of a predetermined area on the measured object irradiated with the predetermined light; a conveyor that moves the illuminator and the imaging device relative to the measured object; and a controller that: executes three-dimensional measurement of a predetermined measurement object on the measured object, based on the taken image; measures a height of the predetermined area at least at a time prior to imaging of the predetermined area under the predetermined light; and changes a height position of the imaging sensor based on a measurement result to adjust an interval between the predetermined area and the imaging sensor to a predetermined distance.

Abstract: An apparatus for three-dimensional measurement of an object includes a trigger configured to obtain image information from a measurement camera and to trigger, in dependence on image content of the image information, a measurement output or an evaluation of the image information by an evaluator for determining measurement results. Further, a respective method and a respective computer program are described.

Abstract: An inspection device is provided in which X-rays are radiated in a fan-like shape with respect to an extension direction of steel cords, are transmitted through a conveyor belt, and reach an X-ray line sensor. A control device makes an X-ray generator and the X-ray line sensor move in a fixed relative position at a certain speed within a certain movement range in a direction parallel with a plane and orthogonal to an extension direction of the steel cords. The control device generates two-dimensional image information on the basis of an X-ray transmission signal obtained each time the X-ray generator and the X-ray line sensor move a unit amount equal to a pixel pitch of the X-ray line sensor. The control device detects measurement information relating to the conveyor belt and the steel cords on the basis of the obtained two-dimensional image information.

Abstract: A geometrical error measurement method for a feed drive system includes entering coordinate values of four vertices of a virtual regular tetrahedron, mounting a position indicator to an end of a main shaft of a feed drive system, mounting three center mounts at three respective vertices of the four vertices except for the remaining vertex at which the main shaft is positioned while moving the main shaft of the feed drive system sequentially from one vertex to another according to the entered coordinate values, measuring distances between each of the four vertices indicated by the three center mounts and the position indicator with a double ballbar, and calculating a geometrical error from the measured distances.

Abstract: A system for detecting a position of an object includes a position sensor and a demodulator. The position sensor receives a first excitation signal, senses a displacement of the object with respect to a reference point based on the first excitation signal, and generates first and second sense signals based on the first excitation signal. The demodulator receives the first sense signal and the second sense signal from the position sensor, performs a first cross-correlation calculation between the first sense signal and a second excitation signal and a second cross-correlation calculation between the second sense signal and the second excitation signal, determines displacement of the object with respect to the reference point based on results of the first and second cross-correlation calculations, and determine a position of the object based on the displacement.

Abstract: Laser radar systems include a pentaprism configured to scan a measurement beam with respect to a target surface. A focusing optical assembly includes a corner cube that is used to adjust measurement beam focus. Target distance is estimated based on heterodyne frequencies between a return beam and a local oscillator beam. The local oscillator beam is configured to propagate to and from the focusing optical assembly before mixing with the return beam. In some examples, heterodyne frequencies are calibrated with respect to target distance using a Fabry-Perot interferometer having mirrors fixed to a lithium aluminosilicate glass-ceramic tube.

Abstract: A combined altitude display apparatus for generating a combined altitude value is provided. The apparatus comprises a first altitude input interface, wherein the first altitude input interface receives a first altitude value; a second altitude input interface, wherein the second altitude input interface receives a second altitude value, wherein the second altitude value indicated by the second altitude input interface has a cyclical range; an altitude output interface, wherein the altitude output interface outputs a third altitude value; and a data fusion component coupled to the first altitude input interface and the second altitude input interface and configured to calculate the third altitude value based on the first altitude value and the second altitude value.

Abstract: A sporting field measurement system is disclosed wherein a user is prompted to select, on a mobile device, a field for marking from various sporting field types including, but not limited to football, baseball, softball, soccer, lacrosse, track, tennis, basketball, cricket, polo, rugby, Australian football, volleyball, and badminton. The Global National Satellite System (GNSS) or at least the global positioning system (GPS) is used to locate a user's device. An application displays, on a display, of the mobile device, the dimensions of the specified sporting field as an overlay on a map, generated by the positioning system and it will communicate with the GNSS or GPS of the device to allow the user to track his or her movement along a specified path of a proposed field. This will allow the user to place the appropriate markers and/or paint the field. Deviations from the path may be indicated on the display of the mobile device or by an audio indication generated by the mobile device.