DE1548413A1 - Radar display device - Google Patents

Description

Patent attorneys
Di "l. Inn.F.Wc'Ckipann, Dr. In'j.'A.'Vici ^ na

Di -U'-ir. H .?: · Λτ. \ M & ir., Dipl. Phys. ir. K. Finok-j ■ ^: '''154Ö413

"H Mii.ichcn 27, MSiilsirassa 22;

DECCA LIMITED

Decca House, 9 Albert Embankment, Iiondon, S.ü.1, England

Radar display device

f.

The invention relates to a radar display device for marine vehicles moving on the water surface, such as ships and air-cushion vehicles.

With ship radar it is common to have a panoramic display to use. In the simplest form there are such Displays relative displays, i.e. that the location of the vehicle carrying the radar is fixed, usually in the center of the respective display screen,

ORIGINALiNSPECTED 909834/0738

and that the appearance of another vehicle. 'whose associated position is displayed in relation to the vehicle carrying the radar device, a relative display can be azimuth-stabilized, ie that a reference course direction is fixed on the display screen. The north direction will always be at the top. On the other hand, in the display, the heading of the vehicle carrying the xladar device is in a fixed direction on the display screen. The latter kind. The display is known as the "Schiffsleif" display, as it is normally common for the heading of the vehicle carrying the radar device to be in an upward direction on the display screen. In recent years, however, the actual movement has been widely used The position of the vehicle carrying the radar device on the display screen is not fixed, as is the case with a relative display, but is changed via the display screen * in accordance with the movement of the vehicle in question. .... moved fixed objects, 'as determined by radar - ■ ·'. buoys, it occurs on the display screen in * fixed positions while moving 'targets one of her tat ■ extraneous movement corresponding movement on the display · The display showing the actual movement is normally stabilized with respect to the accuracy of the precision, but can be achieved using the methods described in the British patent ift 795 537 specified rotary tube construction from

90983A / 0738. ,, _; ^ ^{0 0 RIGINAL}

Be ship control type. The present invention can can be applied to all such display types.

When plotting a distant target using marine radar, it is usually necessary to assess whether there is any risk of collision. This is done in the most expedient manner in that it is determined whether there is any change in the course direction of the relevant distant target which the radar device ι

approaching the carrying vehicle. In the case of an azimuth-stabilized relative display, changes occurring in the course direction for a short period of time can be determined by looking at the afterglow trail of a target. However, it will usually be advisable to track the course change over a longer period of time than is possible in order to see the afterglow. Therefore, for all types of displays, it is normal practice to periodically record the locations of all targets with which there is a potential for a risk of collision. Ά In the case of the display showing the actual movement, the necessary graphical calculations must be carried out after each flight in order to determine the relative position so that the relative track can be plotted and changes in the course direction can be determined. Especially in heavily frequented waters, in which a lot of targets can be s_JLcttbar on the display screen

909834/0738

This recording is very time-consuming and exhausting j on merchant ships this recording will be preferably tone an officer made to tell you about it In addition, he has to fulfill other necessary obligations.

The present invention is therefore based on the object To provide an improved radar device for a marine vehicle that simplifies the determination of a collision risk.

In a radar display device according to the invention for

themselves on the surface of the water / moving marine vehicles

a panoramic radar display occurs on the display screen of a cathode ray tube. Thereby bind facilities for selective generation and display of a plurality of separate markings provided on the screen. Sound this Markings each indicate a selected course of treatment. In addition, facilities for separate adjustment of the individual markings are provided in order to use them for the The display can be set to a selected target or carried out by this. A marking diffraction device is arranged in such a way that the marking indicates on the display the direction from the determined target to the location of the vehicle carrying the radar device. The markings are expediently displayed in the time periods between the radar display scans; on the other hand, they can also be used during a Time span in which the radar display

909834/0738

is suppressed. For example, the radar display automatically suppressed during one or more tracks while the markers are displayed » On the other hand, a manually operated push button regulator can also be used to interrupt the radar display and to Representation of the marking may be provided. In the case of a display showing the actual movement, the actual decentered, movement of the display during the intermediate scanning periods, so that this Markings for these chain spans automatically via the The display screen can be moved in accordance with the movement of the vehicle carrying the radar device. The ad can be price stabilized; but it can also be a "ship control" display. In the case of a "Schiffsleif" advertisement, you have to the marking tracks automatically on the screen according to either relative or actual movement Course changes of the vehicle can be set to indicate the currently selected course direction.

The simplest form of marking tracks used to indicate direction are straight markings. Even though such markings can be used and the invention for the sake of simplicity using a rectilinear marking is explained, other forms of Markings are applied «

909834/0738

Lines can be used as straight markings from the location of the vehicle carrying the radar device over the scope of the relevant display screen run out. Control devices can be used to selectively display any number of marking lines and for the separate adjustment of the angular directions of the individual lines be. If so desired, the risk of collision with any vehicle visible on the display screen Then a marker line is set so that it is from the location of the radar device carrying vehicle passes through the location of the target on the display screen. The marker track represents a selected bearing; if the course direction of the target remains constant, i.e. if a If there is a risk of collision, the target area will appear through progressive movement along the marking line. When the course direction however changes, then the target level will change from the Move the marking line out. Once a marking line is set on a target, it is on the Display screen easily recognizable whether the course direction of the destination is changing or not. There is none Recording required to determine whether or not a target's heading has changed. It it should be noted that even in the event that the course of the vehicle carrying the radar should change,

90983 4/0 738

1648413

how this may be necessary »to, for example, a to avoid another vehicle, no setting τοη

In doing so, «int marking lane controllers is required./the maximum possible number of targets to be taken into account at any given moment. In this way there is the possibility of “assessing any collision rielko very quickly and y & was by looking at the advertisements. This is also true in the case where corresponding by a large number of vehicles on the display screen Response characters are generated.

According to the invention, marking _{traces f} which have a straight course and which run through the location of the target on the display screen are not used, but rather such marking traces which are adjustable both in terms of location and direction the positions of the targets concerned are set. The marking tracks can each be formed, for example, by a line, one end of which is adjusted to the target perception. The line could run as far as the location of the vehicle carrying the radar device, but a shorter line is expediently used. Such a marking can be generated by a controllable gate which has the length of a longitudinal line visible on the display screen or the

909834/0738

Starting position and the length of a rectilinear inter-scan marking track in a known manner controls. If such a line is set with one end to the target location, the location gives of the goal at each subsequent moment, based on this end of the line, an intermediate display of the angular divergences between the relative track of the target (in relation to the vehicle carrying the Piadar device) and the Line of constant course direction. One from the end of the The imaginary straight line running through the illustrated target location represents the relative Track, assuming the speed

the

and / fCursriehtung the vehicles remain unchanged $ so the closest close-up distance is easily recognizable.

The marking track can have the shape of a V, the tip of which can be adjusted to the target and the bisector of the angle running between the legs forming the V runs through the location of the vehicle carrying the radar device. Instead of a single straight line as a line with a constant course direction, as described above, two divergent lines are provided here, which can be set at such angles that the lines in question diverge from the line indicating a constant course direction in such a way that there is a predetermined distance closest approximation is given. I _n this case, the tip of the first V

909834/0738

adjusted to the goal, and after that it is only necessary to observe whether the goal perception is inside or outside of the V. E is found If the target perception is within the V, then the distance of closest approach is below the predetermined fourth.

It is simply possible to have two straight lines representing the Y to generate and their directions and starting points for generating intermediate scanning track in a known manner to control. A display system with a fixed coil is expediently used to generate these marking tracks used; the radar display can be made using a fixed coil or a moving coil deflection system.

a number of Embodiments of the invention explained in more detail. Referring to Figure 1, there is a block diagram of one embodying the invention Azimuth stabilized radar system for marine vehicles shown.

In Pig. 2 is an embodiment of the one shown in Fig. shown plant used, for generating control signals serving circuit shown in more detail. In 3 ig. 3 is a similar embodiment as in Fig. shown.

FIG. 4 shows how the system shown in FIG. 1 is shown modified for a kind of "ship control" radar display can be.

BATH 909 834/0 73 8

Ια Figures 5 and 6 is a further modification of the system according to Pig. 1 shown.

According to Pig. 1, the radar system comprises a rotatable antenna 10 to which radio-frequency pulses of short duration emitted by a transmitter 11 are fed via a duplex device 12; Echo signals from distant targets picked up by the antenna 10 reach a long receiver 13 via the duplex device 12, from which a cathode ray tube 14 is subjected to a brightness modulation corresponding to the display. In the arrangement shown, a rotating coil 15 is used for radial scanning; the scanning signal is supplied by a ripple generator 16 which is synchronized with the transmitted pulses η via a clock circuit 17. The coil 15 is rotated by a bearing transmitter 18 in accordance with the rotation of the antenna. ^T 7enn is pre azimuth stabilization in the display, the heading direction data supplied by a Geberkompaß 19 also damwerden supplied to the course direction data transmission system, so that the angular rotation of the spool made the course changes of direction of the Pahrzeugs accordance v / ith.

The present invention relates in particular to to generate marking traces on a display screen. Five or six separately controllable markings are to be provided, which are set to selected targets v / can ground. For simplicity, it's in Pig. 1 of the

BATH ORIGINAL 909834/0738

Pall stated that only three such markings are to be represented. Every marking is a position signaling device 20 provided with two adjustable controls. These can be a distance controller 21 and a Heading controller 22; however, they can also go through Regulator for the immediate setting of two map-based coordinate values can be formed. The signal generator 20 emits direct voltages, which, according to the setting of the regulator, have the catalytic coordinates on a part of the Display screen. These controls can be provided with suitable scales. The one from each position signal generator Output DC voltages are amplitude modulated by signals of high frequency, such as by von a modulation signal source 23 emitted signals at a frequency of 10 kHz. This modulation takes place before decomposition into Cartesian coordinate values, in which the modulation signal has a ratio of sine to cosine the bearing angle input to the position signal generator is broken down into two components. on in this way, the modulated voltages in Cartesian coordinates for each position signal generator lead to the Creation of a straight line that runs through the selected location and in the direction of the location runs towards, in which the vehicle carrying the radar device is located.

909834/0738

The ones from the various Poeitions signal generators emitted modulated signals are a selector switch 24, from which the signals for a selected marking are sent via a gate 25 to the current generator 26 are forwarded, of which to deflect the cathode ray of the cathode ray tube in orthogonal Deflection coils 27 serving directions are fed. The gate 25 is controlled by the clock circuit 17 to the selected signals during the period between successive radar display samples as To represent the marking line. The modulation wave train output by the modulators 23 can be of conventional Be form; it can, for example, be sawtooth-shaped Show course «The easiest way, however, is to use a modulation wave train with a sinusoidal course.

As will be shown, the various position JB signal generators 20 create separate marker tracks generated, each of which can be displayed with the aid of the selector switch 24. This switch can be mechanical or an electronic switch which is automatically operated in such a way that the various markings displayed one after the other. In the latter pail, the position signal generators can be arranged in such a way that that undesired markings are switched off or occur outside of the display area.

909834/0738

Is the selector switch through a conventional, manual formed actuatable switch, it switches in each position one connected to the respective associated controller Identification lamp on, with which the starting point of the respective I-marking track is controlled.

In a conventional embodiment, the selector switch is a rotary switch with a rotatable Permanent magnets and an associated number of magnetically actuatable magnets arranged around the axis of rotation Reed switches formed. With this construction, it is not necessary to use the rotor, which rotates freely can be arranged to exert a frictional force. It it is thus possible to manually set the switch to the appropriate position for setting the controller for the marking tracks to bring, whereupon, if desired, the switch rotor can be rotated so that the different liarking tracks in quick succession appear. In this way it is easier to make a representation than in the case that all Intermediate scanning marks are to be applied at the same time.

According to a typical embodiment, the switch has a rotatable permanent magnet, the five to Reed switches each offset by 60 ° from one another

BATH 909834/0738

assigned. Anyone envisaged in this design The switch can typically be over an angle of 30 ° hi αν; eg be operated; thereby will there should be a failure sector of about 90 ° in which the contact can be reset if none Marking marks are required. Jedor reed switch With the help of two zontal series, the two orthogonal Components of the marking track slide control. switch. 2To brighten the marking track, a third row can be provided, and a fourth row can be used to operate the Kennlarapen to adjust the the voltages used to determine the Cpur output 3 points Regulators be provided. In some cases, the mark track cellular voltage may be the same Switch row can be taken like those for actuating the identification lamps.

Hit the help of the device described above, a marker is selected by the selector switch, and the Regulator for this marker v / earth is set in such a way that the marker tip is on a selected one Target is located; the marking line runs inwards towards the vehicle carrying the radar device. laugh After a short period of time, it can be seen from the representation whether the relative track of the target is along the marking line or deviating from it.

BAD ORIGiISJAL 909834/0738

The marker line gives a collision course for the

the target vehicle assuming that the radar carrying vehicle maintains its speed and course. Any of a number of goals a separate marking can be set,

why it is possible to determine in a simple "way

for which goals the course may represent a collision course.

If the radar display is a display showing the actual λ movement, then the shift signals for the display shift can be fed to the coils 27 in such a way that they are added to the inputs of the current generators 26. These displacement signals would be applied during both the radar display scans and the marker track scans.

A useful embodiment of a Poeitions-Signal- generator- and modulation system is in further details in Pig. 2 shown. According to Pig. 2, the center point of a DC voltage source represented by a battery 30 is connected to earth; A number of potentiometer pairs are connected to the two outer terminals of the battery; In the drawing, a first pair 31, 32 and a second pair 33 »34 are shown. Each pair of potentiometers enables separate settings of two output signals, which correspond to the Cartesian coordinates of the location

909834/0738

Siel is located, can be adjusted accordingly on the display screen are. The DC voltage output by the battery 30 is controlled by an I-iodulation signal source 35 high frequency signals emitted for use of a transformer 36 is modulated so that this alternating voltage is also ' divided by the same division ratio as the direct voltage v / ird. The transformer 36 has two secondary windings 37, which are in opposite branches of the circuit, so that the ■ Ί / echselspannungsverbindungen at the outputs, cT ^ r potentiometers occur, regardless of the direction in which the taps are shifted from their centers, j £ s v / ird will be shown, that these alternating voltage components appear on the display screen Create a liarking line running from the target towards the location of the person carrying the radar .Vehicle runs out.

Any required number of potentiometer pairs, such as the potentiometer pairs 31,32 and 33,34 »can be provided each pair of potentiometers provides separately adjustable signals for a marking track.

In the in Pig. The simple embodiment shown in FIG. 2 involves reducing the amplitudes of the DC voltage components the amplitudes of the alternating voltage components are also reduced, i.e. the markings are shorter

BATH ORIGINAL 909834/0738

when the radar is wearing. Vehicle approaches a target. Such an arrangement can be very useful in practice; Pig. .5, however, shows a signal generator which avoids this disadvantage. According to Pig. 3, a sine-cosine potentiometer 40 is provided, which is fed from a direct voltage source 41 via series resistors 42. An adjustable resistor 43 is located parallel to each puncture device. This resistor 45 enables the size of the DC voltage applied to the sine-cosine potentiometer 40 to be adjusted. In this way, direct voltages can be obtained for each marking, which are characteristic of the sine and cosine components of an adjustable voltage, the angular direction being determined by setting the sine and cosine potentiometer 40. Directly parallel to the potentiometer 40 is an alternating voltage coupling transformer 44 via direct current blocking capacitors 45. In this way, an alternating voltage of constant amplitude is broken down into sine and cosine components and superimposed on the direct voltage components.

The arrangements described above provide rectilinear ones Marking marks. To a. Washed-out; the radar display too avoid ,, the lines should preferably be very short ;;. for an observer it is enough to compare the \ direction

the line with the target course above the radar screen, however Out, if, the goal is a long enough distance in .direction of the relevant course bev / o ;; t!: ··.!;. change Directional marker shapes can also be used. In particular, an X or V marking can be used where, the intersection of the X resp. the vertex of the V is brought into the selected position, i.e. that the points mentioned are initially in

"brought the target position v / erdevi from which the two Leg related or between the selected position and your location of the vehicle carrying the radar dive running line. The two, one of those ! • Lines forming labeling can be separated consecutively are generated, including a portion of the scanning input signal supplied to the other coil for each deflection coil is fed. Using a sinusoidal signal broken down into two components, this leads symmetrical. Setting of these signals thus to a X-i-mark no ;. To produce a Y-IIarking successive half-cycles of the signals are brightly controlled. The opening angle can be adjusted by adjusting the ratio dös X or V change *

According to Figure 1, the * S'tromgenemtoren 26 as Sümmierverstärker verwendet.'Dabei it is only required large £ Lich _r a Ίβϋ the firing of dear gate 25 current generator led Eingängss ^ ignais obstructing via DC

BATH ORIGINAL

To feed capacitors to the respective other power generator. The two lines representing the V are produced separately by first adding the cross or cross components with one sign, and that the sign of these added components is then changed.

The opening angle between the legs of each V-mark is preferably controlled automatically according to the setting of the position of the vertex of the V so that the Y / inceldivergens corresponding to the distance of the vertex from the location of the vehicle carrying the radar device changes in such a way that those given by the two lines. Distances of the smallest approximation remain constant, regardless of where the marker line is.

In addition, a pulse generator generating the required marking lines can be provided for each of the two axes, whereby the output signals of the individual position signal generators are successively switched through to the function generators as unmodulated DC voltages, so that the various markings are generated one after the other, which are caused by the settings of the position signal generator start from certain positions. The votes of jedem.Positions signal generator DC voltages not control ^- only the starting point of the mark, but also the

9 0 9834/07 3

through this poem, ü'-s is special be advised that there are no signals indicating the speed or course of the targets required are.

For a "Schiffsleif" display, the arrangement shown in FIG. 1 is in the "./eise au mod if isii.ren" that the course stabilization signal ο fed to the course direction data transmission device 18 is omitted, and furthermore the angular position of the I- larkiοrungsspur around the center of the display screen (or around the location of the car carrying the radar device, if an actual movement shift is provided) according to the course changes. of the vehicle. For this purpose it is expedient to use Ilarkierpositionsignalgenerators with distance and course direction singing controllers, and furthermore, like Pig. 4 can be seen, from a transmitter compass 50 IZursdaten a differential gear 51 is supplied, which is in mechanical connection between a course data input controller 52 and the ioinktionsdrehmelder 53. The course correction does not have to be done by a differential gear provided in the input of the puncture detector, but can also be done by rotating the body of the puncture detector.

BATH ORIGINAL 909834/0738

Wena has been found to be another ship is on a collision course, it may be necessary * Z-IaMahntea to prevent a collision meet. In this pail it is before a course change and / or speed change often desired * the effect of such a change in relation to others Assess goals. Fig. 5 shows the embodiment of a Direction of the gate, corresponding to this purpose, additional signals supplies to the display device according to FIG. According to Fig. is a DC voltage supply source 70 with a motor operated Tap 71 provided, with the help of one output voltage that rises evenly from Hull can be. This variable voltage passes over ■ Series resistors 73 on a Ginus-Cosinus potentiometer Parallel to this sine-cosine potentiometer 72 lies an adjustable I * level resistor 74, with the help its the size of the voltage applied to the potentiometer 72 be changed kaaa. The middle end of the potentiometer

■ ■ ZtBw.
is grounded * and through the use of a ^{KebeaschZL flow above this © 131} with a grounded Iiitteäbgriff, The adjustable "resistance 74 and the Slnus-Cosine" potentiometer 72 give GielchSpänaungSSignaie * which are identifiable for these coordinates By actuating the pushbutton switch, signals are fed to the flow 2-S according to FIG

äargest & lit w-efdett »Ia the simplestea

Form, the sine-cosine potentiometer.72 is set according to the angle associated with the relative yector direction of movement from the test course and the actual course; the resistance 74 is in this case the vector speed of the relative movement corresponding. set. The tap 71 becomes the from ITull. Pressed time at which the markers are set on the targets. "After a short period of time, if the push-button switch is operated, the I-Iaration lines are shifted according to the size of the output signals of the oinus-cosine Iotentio'neters The vehicle carrying the radar device are set on the display screen, but on a fictitious location that is there, v / o the vehicle carrying the radar device would be at the moment if it had been on the new course at the time the tap was put into operation and / or would have been operated at the new speed. If a target is on the shifted line, then it is on a Koilisiönskurs, - referred to - ^. Uf the fictitious course of the vehicle moving the radar device. The "Eotetitioraeter 7.2. and the adjustable Y / resistance 74 can be set so that the optinal jfikiive course includes: all targets, found; is »The cheapest experimental course lets you see. i-ft. aeW short time. ίκ Sex "practice. f-Shift it z & none; beöeuteöä UfttersföfeieS that ias optimum

; " ^: BAD ORIGINAL

determined at the time of Hull, rather than a minute wasted two minutes later.

When in Fig .; 5, it is necessary to the potentiometer 72 .and, 'den. "Resistance. 74 accordingly the relative movement, i.e. corresponding to the vector difference between the test speed and the actual speed on the one hand and the test course and the actual course on the other. To simplify the '' operation, it can do a lot expedient, the potentiometer..72 and the V / iderstand immediately set the test course and the test speed accordingly and a vector subtraction of the Movement of the vehicle carrying the radar device Use of a second sine-cosine potentiometer 75, like the codification shown in FIG. 6 of the one shown in FIG. shows the arrangement shown to make. In Fig. 6 The same elements as in FIG. 5 are denoted by corresponding reference numerals.

The sine-ICosine potentiometer 75 is according to the .Direction of movement of the vehicle carrying the radar device set, and the voltage at the potentiometer 75 regulating Sinstellv / lderstand 76 is according to the The speed at which the vehicle carrying the radar device moves is set. Which is the direction of movement and speed related information

909834/0738

Appropriately from the dip actual movement indicating Gystorn taken A / ground after these sizes are required there anyway. The front of the sine-cosine potentiometer 75 output signals v / earth from the Ruth-like output signals of the sine-cosine potentiometer 72 subtracted, v / as takes place in an expedient manner in that this signal c riJt. Appropriate provision the otrougeneratoren 2G are fed!], which as addition (or Subtr: ict \ ons-) "" / act correctly. 3.5 for the one in Pig. 6th The given arrangement is the Yerouch course and the speed by on the lieglern of the sine-cosine rotter 72 and the ^ 'resistance 74 located Classifications displayed.

The tap 71 shown in Figures 5 and 6 only needs a short time, e.g. for five minutes to be operated.

BATH ORIGINAL

909834/0738

Claims (15)

P a t e ti t a η s ρ r- ii c Ii e 1. Kadar display device for vehicles moving on the surface of waters, characterized by the use of a plurality of one at a time in a hadar display screen selected ICursrichtung indicating marks selectively generating and representing on the. 'i-fng screen means (20.2-Ί, 25,26) and by a separate diener Uinetollung j ^ ^ .rki stanchions on the location of the selected target on the display screen causing ülinstellvorrichtutigen. (21,22), each of which when the relevant 'mark-on. the display screen. Information about the direction from the selected target to the location of the vehicle carrying the radar device is available. 2. Radar display device according to Claim.1, characterized By means of the markings, devices representing periods of time between radar display scans (16.17.25). 3. Radar display device according to claim 1, characterized by the markings (16, 17, 25) representing devices (16, 17, 25) during such time segments, during which one or more radar display functions are suppressed. 4. Radar display device according to one of the preceding claims, characterized by a control device (31, 32 in. X, which is derived from a DC voltage source (30) and which supplies separately adjustable voltages and supplies the display screen with two, the position of the 'respective marking within two Cartesian coordinates ¹ Ig.-2; 72 in Fig. 5). ^l j. üadar display device according to one of claims 1 to 3, characterized in that for each I marking an adjustable, variable direct voltage (30) dividing sine and IZosirmn components sine-Iiosine dissolving device (31,32; 33,34 or 53) and furthermore the direct voltage (30) is provided before it is broken down into devices (35, 36) which modulate the sine and cosine components which serve to supply deflection control signals for the marking. 6. Radar display device according to claim 2, characterized in that that the one taking place on your display screen Panorama display is azimuth stabilized, and that the 'adjustable sine-cosine resolver (53) with a manually operated controller is provided for their immediate setting. BATH ORIGINAL 809134/0 73Ä 7. Radar display device according to claim 5 or 6, characterized in that the panoramic display taking place on the Anseigeschirin is a "ship control" -Ansoige is, and that the setting of the opening device (53) in accordance with the course direction changes corrective course-controlled directions of the vehicle (51,52,55) are provided. 8. ° vT.dar display device according to one of claims 5 to 7, characterized in that the manually operable control devices ( ^fl 3) are set by the manually operated control devices (fl 3) provided for displaying the I markings the at
Larger / of the opening device (40) in each case lying DC voltage takes place. 9. Aadar display device according to one of claims 4 ». 7th or 8, characterized in that the DC voltage is modulated with a sinusoidal wave train. 10. Radar display device according to claim 9, characterized in that that the marking lines each time during a hard wave of the modulated DC voltage switching devices (16, 17, 25) provided are. 90 983 4/0738 11. Radar display device according to one of claims 4 to 10, characterized in that the deflection control signals als.Ströme of corresponding strength emitting current generators (26) with on a cathode ray tube (H) orthogonally arranged deflection coils (27) are connected. 12. Radar display device according to claim 11, characterized ^ characterized in that the radar display is the actual one Movement reproducing display is, and that by delivering correspondingly high currents to the orthogonally arranged deflection coils (27) a display shift corresponding to the respective vehicle location causing power generators (26) the relevant Coils (27) both during the radar display scans and during the display of the Dine markings. 13. Radar display device according to one of the preceding claims, characterized in that each marking line is designed as X or Y , wherein the crossing point of the X or the vertex of the V is adjustable to the respective target and that between the legs of the X or V lying bisector can be passed through the location of the vehicle carrying the radar device. 909834/0738 14. Radar display device according to one of claims 5 to 12, in connection with claim 11, characterized by each X- or V-shaped marking line represented by two consecutive lines Device that corresponds to the deflection signal in question for each line a small part of the sampling constituent of the deflection signal for the orthogonal directions for the orthogonal sightings. 15. Radar display device according to one of the preceding Claims, characterized in that the aufoiv.-Iudersequid to be displayed automatically. Ilarkiorungen select devices (24) switch devices assigned. 16. Radar display device according to one of claims 1 to 5, characterized in that only an adjustable sine-cosine resolving device (31,52; 33,34) is provided, with the aid of der_j3n a variable direct voltage (30) can be broken down into sine and cosine components, and function generator devices (26) connected via a selector switch to the devices (20 to 25) provided for the selective display of the I-markings (24) the output signals of the individual dissolving devices (31,52; 33 »34) 909834/0738 na ehe incnd ο.? p.ufnohmeu. it η α nine of ο inen Au Dg ¹ Vi "; onunkt p-us in a through which the U ¹ UrIkI iotisgenervtorvorriehtung (26) input control eye saving Munging best iimnte direction extending Ii generate chtungsnarkierung.. 17 · Ilad.'xr display device according to one of the preceding Claims, characterized in that additional laterally changing deflection signals emitting Devices (72,75) ^ to show the difference between-the actual position of the do.s The vehicle carrying the radar and the position in which the Pihrseug would be if it was sun sideways I, ull under one another Hurs and / or with another Speed would have been moved accordingly l. marking lines are provided. 15. lladar-Anse ige device according to claim 17, characterized characterized in that the additional deflection signals supplying devices (72,75) have a first, a and time-adjustable voltage decomposing / according to the required speed of comparison degrading and adjusted according to the direction of the experiment of the annual equipment wearing the Iladar device Sine-Cosine PotentioLieter (72) and a second, the and time-varying voltage decomposing / ". he actual Reduce speed accordingly- BATH ORIGINAL 90983 Ul 0 738 and the actual direction of movement of the vehicle carrying the radar device set · .- sine-cosine potentioineter (75) include, and that a shift of the marking lines in two coordinate directions corresponding to the differences between the relevant, from the output signals given by both sine-cosine potentiometers performing facilities (26) are provided. 909834/0738