JPS6144381A - Apparatus for displaying submarine line - Google Patents

Abstract

PURPOSE:To make it possible to display a submarine line in such a state that the relative relation to the submarine line cut in a perpendicular direction is easy to be determined, by together displaying the submarine line and an image other than said submarine line in the same picture on the basis of the signals from first and second means for outputting predetermined image signals. CONSTITUTION:An isobath chart is displayed on the right upper part of the picture of a display device and submarine lines are respectively displayed on the left and under sides of said isobath chart. The position of an own ship is shown as S and position separated by one mile in the advance direction thereof is shown as T. An O-point is the center of the isobath chart. With respect to the submarine line cut along the perpendicular plane passing the point S and the point T, one looked in the east and west direction is displayed on the under side while one looked in the south and north direction on the left side. That is, one picture is divided and the submarine line is displayed at the divided predetermined place and at least one of the isobath chart, the searching image around a vessel and the image showing the relation of latitude and longitude is shown on the remaining place of the picture and the relative relation to the submarine line is displayed obviously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a submarine line display device that displays a submarine line in a predetermined direction around a sailing ship.

[Conventional technology]

The following devices are generally known as devices for displaying conditions under the sea or on the seabed.

■ A display device that displays a contour map based on the ocean floor topographic map issued by the National Security Agency or the relative relationship between the position measured by a positioning device and the depth measured by a depth sounder.

■ A display device that uses sonar and radar to display schools of fish near your own ship, the positions of other ships pulling nets, and the positions of other ships navigating nearby.

■ A display device that displays the relationship between own ship's position and longitude and latitude.

However, each of the above-mentioned display devices has a dedicated configuration, making it difficult to understand the relative relationship with the submarine line cut in the vertical direction, which is inconvenient in practice.

[Problem that the invention seeks to solve]

In view of the above points, the present invention provides a practically extremely convenient seabed line display that displays various images in an easy-to-understand manner relative to a seabed line cut vertically, allowing safe navigation, fishing, etc. The aim is to provide equipment.

[Failure to solve the problem]

In order to solve the above-mentioned problems, the submarine line display device of the present invention includes a first means for outputting an image signal of a submarine line cut along a vertical plane passing through two predetermined points in the horizontal direction, and an image showing a contour map. , a second means for outputting an image signal of at least one of an image obtained by exploring the surroundings of the ship and an image showing a relationship with latitude and longitude; The present invention is configured to include means for simultaneously displaying an image of the submarine line and other objects on the screen.

[Effect]

In other words, the - number of screens is divided, and the submarine line is displayed at a predetermined divided portion K based on the image signal output from the first means, and the remaining portions of the screen are displayed from the second means. At least one desired image of the above three types of images is displayed based on the outputted image signal, and the relative relationship with the seabed line is displayed at a glance.

〔Example〕 Next, embodiments of the present invention will be described with reference to the drawings.

In this example, an image of the seafloor line and a contour map are shown together,
In addition, the submarine line cut along a flat vertical plane corresponding to the direction of travel of the ship is determined, and the submarine line is shown as viewed from both the north-south direction and the east-west direction.

FIG. 1 shows an example in which a contour map and a seafloor line are displayed together in the above-described manner.

That is, a contour map is displayed at the upper right of the screen of the display 29, which will be described later, and a seafloor line is displayed on the left side and bottom of the contour map, respectively. In the figure, S indicates the position of the own ship, T indicates the position 1 mile away from the 8 points in the direction of travel of the boat, and 0 indicates the center of the depth contour map. This contour map is displayed north-up, and the scale is set to have a display width of 3 miles in the east-west direction and 2 miles in the north-south direction.

Regarding the submarine line cut along the vertical plane passing through the above 8 points and point T, the one seen in the east-west direction (vertical cross-section) is on the bottom.1 The one seen in the north-south direction (vertical cross-section) is on the left. are displayed respectively. Note that the horizontal scale interval is % miles.

FIG. 2 shows the configuration of the display 29, where the number of pixels in the east-west direction is 0 to (M-'l), and the number of pixels in the north-south direction is O to (M-'l).
N-1) are set to N@, respectively, and the total number of pixels is set to MXN. On the screen, if the west direction is the X direction and the south direction is the Y direction, then 0 in the X direction
A contour map is displayed at locations between ~(m-1) and 0~(n-1) in the Y direction, and the seafloor line is displayed at other locations. Therefore, the position of the 0 point is (m-1)X% in the X direction and (n-1)X/ in the Y direction. Assume that the ship moves on the isopath map over time. In other words, the display mode of this embodiment is north-up true motion.

FIG. 3 is a block circuit diagram of this embodiment. Before explaining the block circuit diagram, explanatory terms and corresponding symbols will be explained (see also FIG. 1 and FIG. 2).

←)Display range L miles in the north-south direction (Y direction) East-west direction (X direction) and north-south direction (Y direction) of the drawing surface
Since the ratio is 3:2, /LL in the east-west direction (X direction)
Miles. In FIG. 1, L=2. Also, since the pixel is a square, (m -1): (n-1) =: 3:
It is 2.

(b) Display mode As mentioned above, it is a hot spring.

(c) Display depth range Sd x (Sn-1) meters O
A vertical cross-sectional view is displayed at a depth from Sd)<(Sn-1). In Figure 1, it is 50 meters.

B) Scale interval Sd is the scale interval in the vertical cross-sectional view, and in Fig. 1, 5d = 10.

(e) Number of scales This is the number of scales in the vertical cross-sectional view of Sn, and in FIG. 1, 5n=6.

(to) X scale position 0 on the screen of the vertical cross-sectional view display 29 displayed on the left side
meter position.

(G) Y scale position no O on the screen of the vertical cross-sectional view display 29 displayed on the lower side
meter position.

(Example inter-pixel distance Ja: pixel-to-pixel distance on the screen of the display device 29 between adjacent scale marks displayed in a vertical cross-sectional view. It is the same for both the left side and the do side.

(S) Location of Ship Los, Lag In the ship's position on the map, 1Los indicates longitude and L■ indicates latitude, respectively. In this embodiment, Los indicates east longitude and Lam5 indicates north latitude. Note that the same applies to the following 0 point and T point.

(Position of 790 points Loo, La.

Location of point 0 on the map.

(-) Location of point T LOT, location of La71 point on the map. This position is naturally determined from the position of the ship mentioned above, the bow direction of <f)j and the submarine line display range of (Y), which will be described later. Not shown.

(Support) Position of 8 points xs・7s The position of point S (ship) on the screen of the display 29 on the contour map.

('7) Location of point T XTI 77 Location of point T on the isoline diagram on the screen of display 29.

(bow direction B degrees View clockwise from north.

(Y) Submarine line display range W mile Straight line length from point S to point T. In FIG. 1, W=1.

Next, a description will be given based on FIG.

1 is a positioning device such as Q-Lan, Omega, Dhaka, or NN5S, which outputs the ship's position Log and Lag in minutes (in units of 5) and inputs them to latches 2 and 3, respectively, to the j counter 49 described later.
The above Las and Lo
Memorize g.

Las and Log from each of the latches 2 and 3, and the O point position Lao and L60, which are similarly output in minutes ('), are input to adders 4 and 5, respectively, and the O point position and S point position are input to adders 4 and 5, respectively. The difference is required.

Note that the adder is displayed on the drawing as shown in FIG. 4(a) for input signals A and BK thereto.
In the case of and ■, A4-B is output, and as shown in (1) in FIG. 4, in the case of ■ and O, A-B is output. The above adder 4.514 all correspond to the latter.

The data from the adder 5 and the data from the ROM 12 are input to the multiplier 6, and the data from the multiplier 6 and the data (-2X (m-I The distance between pixels in the X direction on the screen of the display 29 is calculated.The unit of the output from the multiplier 6 is miles.The sign - of the data (-2×(m-1)X%L) is the east longitude. This is because the X direction of the display 29 is taken into account, and the decimal places of the calculated value of the multiplier 8 are rounded down.

Furthermore, the data from the multiplier 8 and the data ((m-1)
X/) is input to the adder 10, and the positions Xs of the eight points in the X direction are determined.

The data from the other adder 4 and the data (-2×(m-1
)×4L) is input to the multiplier 7, and from the latitude difference the display 2
The distance between pixels in the Y direction on the screen of No. 9 is calculated. Here, the numbers below the decimal point are truncated.

Note that since the pixel is a square, from the relationship (a) above, (-2x (m-1)x"/, )-(-(n-1)
X''t).The unit of the output of adder 4 is miles.

Furthermore, the data from the multiplier 7 and the data ((n-1)
X%) is input to the adder 9, and the positions xy of the eight points in the Y direction are determined.

13 is a direction measuring device such as a gyro compass or a magnetic compass, and outputs the bow direction B to latch 1.
4, and the above B is stored by inputting a clock pulse from a J counter 49, which will be described later.

As a result of the above, the positions Xs of the eight points on the screen of the display device 29 are determined.

7s and the bow direction B are determined.

Next, a straight line ST connecting point 8 to point T, which is W miles away, is determined, and the depth of the ocean floor on ST is determined to create a vertical cross-sectional view.

Generally, the following method is used to connect two points S and T on the screen of the display 29. In addition, in Fig. 5,
Let us start from point 8 and head towards point T.

Using 8 points as a reference, find the pixel distance between 8 points and 1 point, and let them be ΔX and Δy. Δx=xT-xs (Δx = -11-5) Δy=yT
-ys (Δy = 2-6).

Compare Δx1 and 1Δy1, and if 1Δx1 is large, increase X from xs by 1 (when ΔX is positive) or decrease (when ΔX is negative), and change y to y accordingly.
Increase (when Δy is positive) or decrease (when Δy is negative) by 17y/Δx1 from s. And X is 1 by 1
When Δx increases or decreases once and reaches XT, the straight line S-
T is completed. Note that 11 is an absolute value symbol.

If lΔ71 is large, y is increased by 1 (when Δy is positive) or decreased (when Δy is negative) from point ys, and X is accordingly increased by 1 /Δy1 from xs (Δy
(when X is positive) or decrease (when ΔX is negative). Then, y increases or decreases by 1 1Δ71 times to 7T
When the line 8-T is reached, the line 8-T is completed.

In view of this general method, in this example, to find the straight line ST from the positions of eight points (xs, ys), B and W miles, draw a circle with radius W as shown in Figure 6. . W
is the length on the screen of the display 29 corresponding to W miles, and w = W (n - 1) X/2L. Let the positions of point T' on this circumference be X'T and 7'T. As shown in the figure, Table 1 is created depending on which direction the bow direction B is when dividing into 8 equal parts (1 to 2) of 45° each including the east-west direction and the north-south direction. Table 1 shows L=
This is a table when 2 miles and W=1 mile. Here, X'T
and 7'T correspond to the aforementioned ΔXK and Δy, respectively. .

Therefore, compare the magnitudes of aVi+Δx1 and 1Δy1, b is the positive or negative of ΔX, C is the positive or negative of Δy, d is the number of times to increase or decrease by l, and e is the value of 11 so Δy1 or +J77, f1. Show each.

By the above means, the data B from the latch 14 is RO
M15 is input, and the value of Table 1 corresponding to the data B is outputted.

As mentioned above, increase X or y by 1ΔX from point KS S.
The T point is reached after increasing (t or decreasing) I (crossing 1Δyl) times, and the y (vertical) synchronization signal is used as a pulse for changing by one.

Then, the depth at that position is changed by 1 during the y retrace period, and the depth at that position is read out from the seabed depth ROM 68, and the seafloor line is written in the graph memory 70 according to the position and depth during the display period K.

This is a 52fii counter, which is composed of an m-ary up counter, and changes X, S, or y by 1 from point S.

51 is a comparator that compares the value d output from the ROM 15 plus 1 by the adder 45 and the count value of the i counter 52, and when the count value reaches (d+1), the pulse is sent to the j counter 49 and 1 counter 52 and resets the i counter 52. That is, the pulse output from the comparator 51 indicates that the T point has been reached.

The J counter 49 is a J-adic up counter, and latches the pulse when the count value returns OK from J-1.
4 respectively, and the new values of Lag and Los+B are taken in. Since the input pulse of the 1 counter 52 is a vertical synchronizing signal, the screen of the display 29 is
x (d+1) times of scanning, thereby displaying a vertical cross section and a contour map.

47 is an AND circuit, 46 and 4B are comparators, and 50 is a flip-flop (F/F). With these circuit configurations, the count value of the i counter 52 is d, and the count value of the j counter 49 is At the time of J-1, that is, the new La
When scanning one screen before importing s, Los・B,
All memory contents of Graph Memo 'J70 are erased. The flip-flop 50 is a D flip-flop, and while scanning this screen, it sends the IT L '' signal to the data input of the graph memory 70 through the switch 72.
Further, the clock pulses from the clock pulse generator 24 are inputted to the R/W input of the graph memory 70 through the switch 73, respectively.

55 is a multiplier, l /Δy+ or +JY/Δx
It constitutes a circuit for adding 1 each time the ΔX vertical synchronizing signal is output, and is configured to multiply by the count value of the 1 counter 52 instead of adding.

Reference numeral 56 denotes an adder, which adds 0°5 to the output value of the multiplier 55 and further rounds off the decimal places, forming a so-called circuit for rounding off the decimal places.

It is a 3QH switch, and depending on the value of a output from the ROM 15, when 1Δx1≧IΔy1, it will be switched to the right side, and 1Δx1≧IΔy1.
When x1<1Δy1, one and one contacts are made on the left side so as to move the contacts, respectively.

35 is also a switching device, and is configured to move the contact to the upper side by 1 when Δy≧O and to the lower side when Δy<o, depending on the value of C output from the ROM 15.

Furthermore, 36 is a switch, and depending on the value of b output from the ROM 15, when ΔX≧O, it is switched to the upper side, and when ΔX < O
The structure is such that the respective contacts are moved downward when .

With the above configuration, the switch 35 outputs the value of y on the straight line ST on the display 29, and the switch 36 outputs the value of X.

31, 32 and 33, 34 indicate adders, respectively.

Reference numeral 67 indicates a latch, 71 indicates a switch, 54 indicates a flip-flop (F/F), and 53 indicates a delay circuit. With these, at the timing shown in FIG. 7(a) K,
During the vertical retrace period, the switching device 35.
A circuit is configured to read the depth on the straight line ST specified by 36 and store it in the latch 67.

63 is a multiplier that multiplies the depth value output from the latch 67 by the ratio of the inter-pixel distance to the scale interval, jd/Sd.
65 to the X scale position and Y scale position to calculate where on the screen of the display 29 the depth value will be displayed when drawing a vertical sectional view.

37.3B and 39.40 respectively indicate comparators, and
41, 42, and 43 respectively indicate AND circuits, and the display 29
X counter 23 and X counter 2 indicating the upper scanning position
2 count value, switch 35゜36 and adder 64.65
The respective output values are compared by comparators 37.38 and 39.40, and are output to AND circuits 41, 42, and 43. The AND circuit 41 is a straight line S on the isotopic diagram.
- The write position K of the graph memory 70 on the T, the AND circuit 42 is 1 at the write position of the graph memory 70 on the left vertical cross-sectional view, and the AND circuit 43 is 1 at the write position of the graph memory 70 on the lower vertical cross-sectional view. It is configured to output a pulse when the writing position coincides with the write position.

The graph memory 70 has two vertical cross-sectional views and a straight line S-
This is a RAM that stores T, and the number of storage elements is MXN.

The graph ROM 59 is a ROM that stores scales and numbers of two vertical cross-sectional views, and the number of storage elements thereof is MXN.

The seabed depth ROM 68 stores the seabed depth and isobath lines between 3L/2 miles in the east-west direction and 57419 in the north-south direction centering on the 0 point on the map. The number of memory elements is mxnx
(k+1). k bits urH for bottom depth, 1
Bit is for contour map.

Note that the seabed depth is not written in all places, but only in places where the seabed depth is known from the bathymetric map or by a depth sounder, and in other places, the Db value is written.The Db value is 0. It is sufficiently thicker than the maximum seafloor depth near the point.

The switch 73 switches the output of the OR circuit 44, the J-res period, and the erase noz period K output from the flip-flop 50, and the pulse output from the clock pulse generator 24 from the R/W of the graph memory 70. Supply to the terminal.

The outputs of AND circuits 41, 42 and 43;
As shown in the timing chart (b) of the figure, for example, only when the count value of the X counter 23 is 10, the switching
Only one pulse is output.

During erasing, this pulse is continuously output for one screen scanning period. When this pulse is “L”, the graph memory 70
is in the writing state, and when the output pulse of the AND circuit 41゜42.43 is 11)111, and when erasing, f
Write 'i'L''.

The switch 72 inputs the data input terminal [''L=1] of the graph memory 70 only during the erasing/erasing period.

The switch 71 switches the seabed depth ROM only during the vertical retrace period.
59, the position on the straight line ST outputted by the switching devices 35 and 36 is inputted, and the count values of the X counter 23 and the X counter 22 for other periods, that is, the display period are inputted. .

The X counter 23 is a quaternary up counter, and its count value X indicates the scanning position of the display 29 in the X (horizontal) direction. Furthermore, it is M.

The y counter 22 is N. This is a forward up counter, and its count value y indicates the scanning position of the display 29 in the y (vertical) direction. Furthermore, N. >N.

As described above, based on the counted values of the
The scale and numbers, as well as the straight line ST and two vertical cross-sectional views are read out from the graph memory 70, and based on these image signals, the color conversion ROM 25 and the D/A converter 2 are read out.
6. 27. It is displayed on the display 29 via 28.

The R/W terminal of the graph memory 70 is normally at "H" and only reading is performed, but when a pulse is output from the OR circuit 44, writing is performed as described above.

20 and 21 are comparators, 18 is an X deflection amplifier, 19 is a Y deflection amplifier, 16 is an X deflection coil, and 17 is an X deflection coil.

58 is an indicator that displays the shallowest value between straight line ST,
The configuration for displaying this shallowest value will be described next.

Reference numeral 61 denotes a launch, which is configured to store the shallowest value from point 8 to the intermediate point when a point halfway between the straight line ST is being displayed.

When the points are displayed sequentially from the intermediate point to the next point, the depth value of the next point is output from the latch 67, and that depth value and the shallowest value from the latch 61 are input to the comparator 60. be compared. Here, only when the depth value from the latch 67 is shallower, the switch 66 is turned on, and the delay 5 is turned on.
With the output pulse No. 7, the depth value output from the latch 67 is stored in the latch 61 as the shallowest value.

Reference numeral 59 denotes a latch for storing the shallowest value to be displayed on the display 58, and the value of the latch 61 is input and stored by a vertical synchronizing signal during the erasing period.

Note that the latch 61 is used immediately after this to store the value of [Db and to obtain the shallowest value of the next straight line ST.

Regarding the timing relationship 9, refer to FIG. 7(a).

Reference numerals 62, 74, and 75 are switchers that are set to the erasing period K"On".

In addition, latches 2, 3, etc., graph memory 70 in FIG.
．． ROM15.6B, 69, counter 22゜23.4
The symbols attached to the input and output terminals of 9 and 52 will be explained below.

(1) Latch 2, 3, 14.59, 61.67Di
: data input, Do: data output, CK: clock pulse input.

(2) Graph memory 70, ROM15.68.69
D1: Data input, DO: Data output, R/W: Read/write control input, A near address input.

(3) Counter 22, 23, 49.52C: Carry pulse output, CK: Clock pulse input, CLR: Clear input, DQ 22 numerical output It refers to a memory that stores the position and depth of a point over a large number of points, and is also written in conjunction with an isotopic map. Refers to a memory that has a corresponding memory element, stores the depth of the ocean floor, and whose stored contents are read out in synchronization with the scanning of a CRT.

There are two ways to determine the depth of the seabed: use a seafloor topographic map published by the Japan National Security Agency, or measure it by loading a positioning device and a depth sounder onto a ship.

In order to write the seafloor depth from the seafloor topographic map to the seafloor depth memory, first the iso-search line position on the seafloor topographic map is read by a reading device (device that measures the position on one plane of the digitizer), and then the storage device ( The position is stored along with the depth on a magnetic drum, magnetic tape, magnetic disk, etc.). The stored contents are written into the seafloor depth memory by a computer, taking into consideration the position, scale, and direction on the map of the isotopic map displayed on the screen of the display device.

When using positioning equipment and depth sounders loaded on a ship,
When the position and the depth of the position are measured, the respective measured values are stored one after another in the same storage device as described above and written in the same manner.

In the above-mentioned embodiment, in order to display the isoline map, the seabed depth ROM (3
3 was used.

In the above embodiment, many circuits are used to connect the 8 points and the T point, but the present invention uses the ship's position ii La
s, Los, and bow direction B may be input into a computer to obtain the straight line ST, and the two vertical cross-sectional views, the scale, the numbers, and the isopath diagram may be transferred to the graph memory 70.

Other embodiments of the present invention will be listed below.

(D Image shown together with the seabed line (a) Also shown with the image of the surrounding area of the ship (nets, schools of fish, other ships, etc.) detected by sonar and radar ((a) in Figure 8)
reference).

(b) Display the longitude and latitude together with the track display device (No. 8
(See (1)) in the figure).

(C) Recorded with a school of fish using a fish finder ((C) in Figure 8)
)reference).

(d) An image obtained by superimposing the images of sections (a) and (b) above on the image of the isopectogram of the above embodiment is also shown.

Note that in actual use, it is also possible to display only the submarine line if necessary.

■ Position of the vertical plane to be cut (see Figure 9) (a) Direction of movement of moving objects (own ship, other ships, trawl nets, schools of fish, etc.)
(■ in Figure 9) (b) Behind the moving object (■ in Figure 9) (C) Direction perpendicular to the moving direction of the moving object (■ in Figure 9) (d) Below the moving object (■ in Figure 9) (e) An arbitrary direction for moving objects in the direction of schools of fish, other vessels, nets, dangerous objects (sunken ships, reefs, etc.), and shallow water (■ in Figure 9)
) (f) Direction connecting two points on the map (g) Any direction from a stationary object (such as an island or a port of call) (h) Between two moving objects: a net and a ship, a school of fish and a ship, your own ship and others Ships, etc. (i) Between shallow water and a stationary object such as a ship and a moving object [Yes] Number of submarine lines to be displayed The number of submarine lines to be displayed is not limited to one as in the above embodiment, but a plurality of lines may be displayed as shown below.

(a) Parallel straight line C-D・K separated by ΔD from straight line A-B
-F respective submarine lines Cl pZ K/ pl are also displayed (see (a) and (b) in Figure 10).

(1)) Seabed lines C'-D1 of three straight lines C-D, E-F, and G-H orthogonal to the straight line A-B and lined up at intervals of ΔD
．． Display FJl pL, G/Hz (see (a) and (b) in Figure 11).

(C) The seabed lines cl BL of the straight lines CB and DB whose phases are different from each other by an angle Δθ with respect to the straight line lfMA −B.

Dr BL is also displayed ((a) and (b) in Figure 12).
) see )゛.

((1) The three submarine lines in each of (a), (b), and (C) above are not displayed simultaneously, but are displayed one by one one by one.

(5) Display of vertical cross-sectional views Instead of displaying two vertical cross-sectional views as in the above embodiment, one vertical cross-sectional view is displayed corresponding to the cutting direction, or in any direction such as east-west direction, as shown in Figure 13. only.

(Y) Form of a vertical plane that passes through two specified points in the horizontal direction (a) For example, focusing on the fact that the designated route bends at many waypoints, it is possible to create a vertical plane that is cut on a vertical plane that forms a polygonal line when viewed from above. (see (a) in Figure 14), the seafloor line based on it is displayed.

(b) For example, when a purse seine boat throws a net f:, since the boat travels in a circular manner, it is necessary to cut the net on a cylindrical vertical plane that is circular in plan view (see (b) in Figure 14), and the seabed line based on it. Display.

〔effect〕

As explained above, the submarine line display device of the present invention not only simply displays the submarine line, but also displays the submarine line.
Since at least one of the three types of images is displayed on the same screen, it has the following practical advantages.

(i) When an image showing a bathymetric map is also included. Since a bathymetric map alone shows it in plan view, it is difficult to determine the vertical relationship of the seafloor line, in other words, the degree of depth. The degree of depth can be grasped accurately and well by displaying the seabed line, and by displaying both images, it is possible to easily determine, for example, whether there is shallow water or reefs in the direction of navigation of the ship, and when there is shallow water, Based on the contour map,
You can easily determine which direction to take to avoid shallow water, and you can navigate safely.

G11) When displaying images of the area around the ship's hull, not only the positional relationship between the own ship and other ships, nets, schools of fish, etc., but also the relative positional relationship with the seabed line can be accurately and well understood, and the relationship between other ships and In addition to avoiding collisions, especially when hauling a net with two ropes, it is important to check whether there are any dangers such as self-sufficiency, other vessels, or dangerous objects such as shoals, reefs, or sunken ships in the direction of travel of the net. They are easily identified and can be safely navigated and fished.

(J) When images indicating latitude and longitude are included, it is possible to not only understand the course of the ship, but also to accurately determine whether there are shallow waters or reefs in the direction of navigation based on the course. When a ship takes a detour to avoid a problem, it can easily return to its original course and navigate safely.

In other words, by displaying any of the three types of images together with the seabed line, navigation and fishing can be carried out safely and effectively, and it is now possible to provide a practically extremely convenient seabed line display device. Ta.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view showing a display example, FIG. 2 is a front view showing the configuration of the display, and FIG. 3 is a block circuit diagram. , (b) respectively show the latter half of K. 4(a) and 4(b) are respectively explanatory diagrams of the adder, FIG. 5 is an explanatory diagram showing the display form of the display, FIG. 6 is an explanatory diagram for determining the straight line ST, and FIG. Figures (&) and (b) are timing charts, Figures (a), (b), and (C) are schematic front views showing images of another embodiment of the present invention, respectively, and Figure 9 is a cutaway. Explanatory diagrams showing the positions of the vertical planes, (a) and (1)) in Figure 10, e) and (b) in Figure 11, and (a) in Figure 12.
) and (1)) ii, respectively, an explanatory diagram of another embodiment displaying three submarine lines, FIG. 13 is a front view showing a display example of another embodiment, and FIG. 14 (a) and (1)) is an explanatory diagram showing the form of a vertical plane of different embodiments. 22...y counter, 23...X counter, 25...color conversion ROM, 68...bottom depth ROM, 69...graph ROM Figure 1 Figure 2 Figure 8 (a) (b) (c) 1
Figure 0 Figure 11 (a') (b)

Claims (1)

[Claims] (1) A first means for outputting an image signal of a submarine line cut along a vertical plane passing through two predetermined points in the horizontal direction, an image showing a bathymetry map, an image obtained by exploring the surroundings of the ship, and an image signal showing latitude and longitude. a second means for outputting an image signal of at least one of the images showing the relationship; and images of the submarine line and other objects on the same screen based on the image signals output from the first and second means. A submarine line display device comprising means for displaying the line.