JPS6173012A - Bottom clearance display device - Google Patents
Bottom clearance display deviceInfo
- Publication number
- JPS6173012A JPS6173012A JP19482384A JP19482384A JPS6173012A JP S6173012 A JPS6173012 A JP S6173012A JP 19482384 A JP19482384 A JP 19482384A JP 19482384 A JP19482384 A JP 19482384A JP S6173012 A JPS6173012 A JP S6173012A
- Authority
- JP
- Japan
- Prior art keywords
- ship
- depth
- sea area
- bottom clearance
- water depth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
- G01C13/008—Surveying specially adapted to open water, e.g. sea, lake, river or canal measuring depth of open water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Instructional Devices (AREA)
- Navigation (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は船舶の航路周辺海域における船底から海底まで
の距離、すなわちボトムクリアランスを算出し、表示す
るボトムクリアランス表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bottom clearance display device that calculates and displays the distance from the bottom of a ship to the seabed, ie, the bottom clearance, in the sea area around the route of a ship.
従来、船舶の航行に際しては、船舶の航路周辺海域の海
図による水深、海底の性質および暗礁の位置などの読み
取り、さらに航海経験などに基づいて、ボトムクリアラ
ンスが一定値以上となる安全な航路を見い出し、船舶の
座礁を防ぐようにしていた。Conventionally, when navigating a ship, a safe route with a bottom clearance above a certain value is found based on reading the depth of the water, the nature of the seabed, the location of reefs, etc. from nautical charts of the area surrounding the ship's route, as well as navigational experience. , to prevent ships from running aground.
ところで、ボトムクリアランスは船舶のドラフト状態あ
るいは潮汐の状態などによって犬きく変化するので、海
図による水深等の読み取りでは必ずしも安全な航路を見
い出せるとは限らないという問題があった。By the way, since the bottom clearance varies greatly depending on the draft state of the ship, the tidal state, etc., there is a problem in that it is not always possible to find a safe route by reading the water depth etc. using a nautical chart.
また、ソナー等の測深機による水深の計測に基づいてボ
トムクリアランスを知ることが考えられるが、測深機は
船舶の極めて近傍の水深を計測するもので、安全な航路
を見い出すにはあまり役に立たないという問題があった
。It is also possible to determine bottom clearance based on water depth measurements using a sounding device such as a sonar, but sounding devices measure the water depth very close to the ship and are not very useful for finding a safe route. There was a problem.
さらに、海図から船舶周辺海域全体のボトムクリアラン
スを短かい時間で判断することはむずかしく、特に港湾
内または狭水道など船舶が輻積する海域では、多くの人
員を要するのでボトムクリアランスのみに注意を向ける
ことができない。１だ、衝突の回避などにより予定航路
から外れた場合、安全な航路を見い出すことが難しいと
いう問題があった。Furthermore, it is difficult to determine the bottom clearance of the entire sea area around a ship from a nautical chart in a short period of time, especially in sea areas where ships are congested such as in ports or narrow channels, which requires a large number of personnel, so attention should be focused only on bottom clearance. I can't. 1. If a ship deviates from its planned route due to collision avoidance, etc., it is difficult to find a safe route.
本給明は上記実情に鑑みてなされたもので、船舶周辺海
域のボトムクリアランスを一目瞭然に判断できるボトム
クリアランス表示装置を提供するものである。This proposal has been made in view of the above-mentioned circumstances, and is intended to provide a bottom clearance display device that can clearly determine the bottom clearance in the sea area around a ship.
そこで本発明では船舶の位置を検出する位置検出手段と
、計時手段と、船舶のドラフトを計測するドラフト計と
、予め船舶の航路周辺海域の水深を記憶している水深記
憶装置と、予め船舶の航路周辺海域の潮位を記憶してい
る潮汐記憶装置と、船底から海底までの水深を計測する
測深機と、前記位置検出手段が検出する船舶の位置、計
時手段が計時する時刻、ドラフト計が計測するドラフト
、水深記憶装置が記憶している水深および潮汐記憶手段
が記憶している潮位に基づいて船舶の航路周辺海域のボ
トムクリアランスを算出する演算装置、該演算装置が算
出する船舶の航路周辺海域のボトムクリアランス、前記
検出手段が検出する船舶の位置および前記測深機が計測
する水深を表示する表示手段によってボトムクリアラン
ス表示装置を構成する。Therefore, the present invention includes a position detecting means for detecting the position of the ship, a timing means, a draft meter for measuring the draft of the ship, a water depth storage device that stores in advance the water depth of the sea area around the ship's route, and A tidal memory device that stores the tide level of the sea area around the route, a depth sounder that measures the water depth from the bottom of the ship to the seabed, the position of the ship detected by the position detection means, the time measured by the clock means, and the draft meter measured. A calculation device that calculates the bottom clearance of the sea area around the ship's route based on the draft to be stored, the water depth stored in the water depth storage device, and the tide level stored in the tidal storage means, and the sea area around the ship route calculated by the calculation device. A bottom clearance display device is constituted by display means for displaying the bottom clearance of the vessel, the position of the ship detected by the detection means, and the water depth measured by the sounding device.
上記した構成のボトムクリアランス表示装置は、位置検
出手段が検出する船舶の位置、計時手段が計時する時刻
、ドラフト計が計測するドラフト、水深記憶装置が記憶
している水深および潮汐記憶装置が記憶している潮位に
基づいて、演算装置が船舶の航路周辺海域のボトムクリ
アランスを算出し、表示手段がこの算出したボトムクリ
アランスを、位置検出手段が検出する船舶の位置および
測深機が計測する７Ｋ ｆｉと併わせで表示する。The bottom clearance display device configured as described above stores the position of the ship detected by the position detecting means, the time measured by the clocking means, the draft measured by the draft meter, the water depth stored in the water depth storage device, and the tidal storage device. Based on the current tide level, the computing device calculates the bottom clearance of the sea area around the ship's route, and the display means displays the calculated bottom clearance as the position of the ship detected by the position detection means and the 7K fi measured by the depth sounder. Display together.
以下、本発明の一実施例を洗付図面を参照して詳細に説
明する。Hereinafter, one embodiment of the present invention will be described in detail with reference to the washing drawings.
第ｉ ｒ２１は本発明に係るボトムクリアランス表示装
置のブロック＋ｆＩｉ成図である。第１図において、１
け船舶の海図上における位置を検出するレーダ（位わ、
検出手段）、２は時計（計時手段）、６および４は船舶
のドラフト（吃水） １ｆｒｆ、＋ ＩＩ、ｌするドラ
フト計、５け船舶の船底から海底までの距離、すなわち
現時ルにおりるボトムクリアランスを計測する徂１深機
、６は船舶の航路周辺海域の水深を記憶している水深記
憶装置、７は船舶の航路周辺海域の潮位を記憶している
潮汐記憶装置、８はレーダ１が検出した船舶の位置、時
計２が計時した時刻、ドラフト計３．４が計沢１１シた
ドラフト、水深記は装置６が記憶している水深および潮
汐記憶装置７が記憶している潮位の各データに基づいて
、船舶の航路周辺海域のボトムクリアランスを算出する
演算装置、９は演算装置８が算出した船舶の航路周辺海
域のボトムクリアランスを一目瞭然に判断できるように
表示するＣＲＴディスプレイ装＠（表示手段）である。The i-th r21 is a block +fIi diagram of the bottom clearance display device according to the present invention. In Figure 1, 1
A radar that detects the position of a ship on a nautical chart.
(detection means), 2 is a clock (timekeeping means), 6 and 4 are the ship's draft (water intake), 1frf, + II, l draft meter, 5 is the distance from the bottom of the ship to the seabed, that is, the bottom that is currently below 1 is a depth device that measures the clearance, 6 is a water depth memory device that stores the water depth in the sea area around the ship's route, 7 is a tidal memory device that stores the tide level in the sea area around the ship's route, and 8 is the radar 1. The position of the detected ship, the time measured by the clock 2, the draft that the draft gauge 3.4 was at, the water depth recorded by the device 6, and the tide level stored by the tidal storage device 7. A calculation device 9 calculates the bottom clearance of the sea area around the ship's route based on the data, and 9 is a CRT display device that displays the bottom clearance of the sea area around the ship's route calculated by the calculation device 8 so that it can be clearly determined at a glance. means).
次に、第２図は上記ボトムクリアランス表示装ｆ々を搭
載した船舶の概略図である。レーダ１は船橋の上に、時
計２、水深記憶装置６、潮汐記憶装＃ ７ 、演算装置
８訃よびＣＲＴディスプレイ装置９は演算表示装置１０
として船橋に、ドラフト計３および４は船首および船尾
に、甘だ測保＠５は船底にそれぞれ配設これている。Next, FIG. 2 is a schematic diagram of a ship equipped with the bottom clearance display device f. A radar 1 is mounted on the bridge, a clock 2, a water depth memory device 6, a tidal memory device #7, a calculation device 8, and a CRT display device 9 are placed on a calculation display device 10.
Draft gauges 3 and 4 are installed at the bow and stern, and Amada Sakuho@5 is installed at the bottom of the ship.
次に、船舶の位置、時刻、ドラフト、水深および潮位の
各データに基づく船舶の航路周辺海域のボトムクリアラ
ンスの算出の一例および算出したボトムクリアランスの
表示の一例を第６図および第４図を参照して説明する。Next, see Figure 6 and Figure 4 for an example of calculating the bottom clearance in the sea area around the ship's route based on data on the ship's position, time, draft, water depth, and tide level, and an example of displaying the calculated bottom clearance. and explain.
なお、水深記憶装置６は船舶の航路周辺海域の位置をパ
ラメータとした水深を記憶しているものとする。すなわ
ち、水深記憶装置６は船舶の航路周辺海域を所定の大き
ざの区域に分割し、この分割した各区域内の所定の地Ａ
（例えば、区域の中心点）における水深をその地点の位
置（例えば、緯度と経度によつ工表わす）とともに、そ
れぞれ記憶しているものである。１だ、潮汐記憶装置７
は船舶の航路周辺海域の位置卦よび時刻をパラメータと
した潮位を記憶しているものとする。すなわち、潮汐記
憶装置７は上記分割した各区域の所定の地点において、
第３図に示すように時間の経過に従って変化する潮位を
七の地点の位置および時刻とともに、それぞれ記憶し１
いるものである。It is assumed that the water depth storage device 6 stores the water depth using the position of the sea area around the ship's route as a parameter. That is, the water depth storage device 6 divides the sea area around the ship's route into areas of a predetermined size, and stores a predetermined point A within each of the divided areas.
The water depth at a point (for example, the center point of an area) is stored together with the location of that point (for example, expressed in terms of latitude and longitude). 1, tidal memory device 7
It is assumed that the tidal level is stored using the position of the sea area around the ship's route and the time as parameters. That is, the tidal storage device 7 stores the data at predetermined points in each of the divided areas.
As shown in Figure 3, the tide level that changes over time is memorized along with the position and time of point 7.
It is something that exists.
演算装置８はまず、レーダ１が検出した船舶の位置に基
づいてボトムクリアランスを表示すべき領域、すなわち
表示海域を定める。次いで、水深記憶装置６に記憶され
た水深のうち、表示海域に含１れる位置の水深を七の位
置とともに読み出し、筐だ潮汐記憶装ｇ７に記憶２れた
潮位のうち、表示海域に含まれる位置の潮位であって時
計２の示す時刻における潮位をその位置とともに読み出
す。The calculation device 8 first determines the area where the bottom clearance is to be displayed, that is, the display sea area, based on the position of the ship detected by the radar 1. Next, among the water depths stored in the water depth storage device 6, the water depth at a position included in the displayed sea area is read out along with the position No. The tidal level at the position, which is the tidal level at the time indicated by the clock 2, is read out together with the position.
さらに、各位置毎に読み出した水深と潮位をそれぞれ加
え、時計２の示す時刻における各位置の水深を算出し、
この時計２の示す時刻における各位置の水深からドラフ
ト計３．４が計測したドラフトのうち大きい方をそれぞ
れ減じ表示海域のボトムクリアランス、すなわち船舶の
航路周辺海域のボトムクリアランスを算出し、算出した
ボトムクリアランスをその位置とともにＣＲＴディスプ
レイ装置９に出力する。Furthermore, the water depth and tide level read for each position are added to calculate the water depth at each position at the time indicated by the clock 2,
The bottom clearance of the displayed sea area, that is, the bottom clearance of the sea area around the ship's route, is calculated by subtracting the larger of the drafts measured by the draft meter 3.4 from the water depth at each position at the time indicated by the clock 2. The clearance is output to the CRT display device 9 together with its position.
ＣＲＴディスプレイ装置９は演算装置８から出力される
船舶の航路周辺海域のボトムクリアランスを第４図に示
したＣＲＴディスプレイ装置の画面４０のように表示す
る。The CRT display device 9 displays the bottom clearance of the sea area around the ship's route, which is output from the calculation device 8, as shown in the screen 40 of the CRT display device shown in FIG.
画面上部には表示海域に対応する枠４１が表示される。A frame 41 corresponding to the displayed sea area is displayed at the top of the screen.
枠４１内はボトムクリアランスの値の等しい地点を結ん
だ等深線４２，４５．４４．４５゜４６で区分され、枠
４１と等深線４２で囲まれた部分＆≠時色、枠４１と等
深線４２と等深線４３で囲まれた部分Ｏが橙色、枠４１
と等深線４３と等深線４４で囲まれた部分Ｙが黄色、枠
４１と等深線４４と等深線４５で囲まれた部分Ｇが緑色
、枠４１と等深線４５と等深線４６で囲まれた部分Ｂが
青色、枠Ａ１と等深線４６で囲まれた部分Ｐが紫色で、
それぞれ塗り潰されている。また、枠４１内にけレーダ
１が検出した船舶の海図上における位置に対応する位置
に船舶が表示きれ、測深機５が検出した現時点における
ボトムクリアランスの値７０が表示される。また、画面
４０の下部には枠４１の色分けした各部におけるボトム
クリアランスの値が表示される。The inside of the frame 41 is divided by contour lines 42, 45, 44, 45° 46, which connect points with equal bottom clearance values, and the area surrounded by the frame 41 and the contour lines 42 &≠ time color, the frame 41, the contour lines 42, and the contour lines The part O surrounded by 43 is orange, frame 41
The area Y surrounded by the contour line 43 and the contour line 44 is yellow, the area G surrounded by the frame 41, the contour line 44 and the contour line 45 is green, and the area B surrounded by the frame 41, the contour line 45 and the contour line 46 is blue. The part P surrounded by A1 and contour line 46 is purple,
Each is filled in. In addition, a ship is displayed in a frame 41 at a position corresponding to the position of the ship detected by the radar 1 on the nautical chart, and the current bottom clearance value 70 detected by the sounder 5 is displayed. Further, at the bottom of the screen 40, bottom clearance values for each color-coded portion of the frame 41 are displayed.
なお、船舶の位置はレーダ１が検出するので、例えば船
舶がボトムクリアランス５ｍ未満の区域に進入したとき
はアラームを発して知らせるようにしてもよい。Note that since the position of the ship is detected by the radar 1, an alarm may be issued to notify the user when the ship enters an area where the bottom clearance is less than 5 m, for example.
以上説明したように本発明によれば、船舶の位置、時刻
、ドラフト、水深および潮位に基づいて船舶の航路周辺
海域のボトムクリアランスを算出し、これを色分は表示
し、併わせて船舶の位置およびボトムクリアランスを表
示することにより、船舶の航路周辺海域のボトムクリア
ランスを一目瞭然に判断できる。また、表示されたボト
ムクリアランスにより船舶がどの程度安全あるいは危険
な位置にあるかを仰ることができ、安全な航ｇ８を容易
に見い出せるので、ボトムクリアランスのみに注意が向
くようなことがなくなり、他船との衝突を未然に防ぎ得
る。ざらに、船舶が輻斡する海域においても、ワンマン
ウォッチζらにはノーマンウォッチが可能となり、航海
の安全を損なわずに、操船人員を削減することができる
。As explained above, according to the present invention, the bottom clearance of the sea area around the ship's route is calculated based on the ship's position, time, draft, water depth, and tide level, and this is displayed in color. By displaying the position and bottom clearance, the bottom clearance of the sea area around the ship's route can be determined at a glance. In addition, you can tell how safe or dangerous the ship is in the displayed bottom clearance, and you can easily find a safe navigation g8, so you no longer have to pay attention only to the bottom clearance. Collisions with other ships can be prevented. In general, even in sea areas where ships are congested, the One Man Watch ζ and others will be able to perform a Norman Watch, allowing the number of ship operators to be reduced without compromising navigational safety.
第１図は本発明に係るボトムクリアランス表示装置のブ
ロック構成図、第２図は第１図のボトムクリアランス表
示装置を搭載した船舶の概略図、第５図は潮位の変化を
示す概略図、第４図はＣＲＴディスプレイ装置９の表示
画面の概略図である。
１・・・レーダ、２・・・時計、３．４・・・ドラフト
計、５・・・測深機、６・・・水深データ記憶装置、７
・・・潮汐データ記憶装置、８・・・演算装置、９・・
・ＣＲＴディスプレイ装置。
代理人 弁理士 木 村 三 朗
１ 第 １図
第２図
第３図
＠ ｆ’＊１FIG. 1 is a block diagram of a bottom clearance display device according to the present invention, FIG. 2 is a schematic diagram of a ship equipped with the bottom clearance display device of FIG. 1, and FIG. 5 is a schematic diagram showing changes in tide level. FIG. 4 is a schematic diagram of the display screen of the CRT display device 9. As shown in FIG. DESCRIPTION OF SYMBOLS 1...Radar, 2...Clock, 3.4...Draft meter, 5...Deep sounder, 6...Water depth data storage device, 7
...Tide data storage device, 8...Arithmetic device, 9...
・CRT display device. Agent Patent Attorney Sanro Kimura 1 Figure 1 Figure 2 Figure 3 @f'*1
Claims (1)
を計測するドラフト計と、予め船舶の航路周辺海域の水
深を記憶している水深記憶装置と、予め船舶の航路周辺
海域の潮位を記憶している潮汐記憶装置と、船底から海
底までの水深を計測する測深機と、前記位置検出手段が
検出する船舶の位置、計時手段が計時する時刻、ドラフ
ト計が計測するドラフト、水深記憶装置が記憶している
水深および潮汐記憶装置が記憶している潮位に基づいて
船舶の航路周辺海域のボトムクリアランスを算出する演
算装置と、該演算装置が算出する船舶の航路周辺海域の
ボトムクリアランスを、前記位置検出手段が検出する船
舶の位置および前記測深機が計測する水深とともに表示
する表示手段とを具えたことを特徴とするボトムクリア
ランス表示装置。A position detecting means for detecting the position of the ship, a draft meter for measuring the draft of the ship, a water depth storage device for storing in advance the water depth of the sea area around the ship's route, and a water depth storage device for storing the tidal level of the sea area around the ship's route in advance. a tidal storage device that measures the water depth from the bottom of the ship to the ocean floor; a depth sounder that stores the position of the ship detected by the position detecting means; the time measured by the timing device; the draft measured by the draft meter; and the water depth storage device. a calculation device that calculates the bottom clearance of the sea area around the ship's route based on the water depth stored in the sea and the tide level stored in the tidal storage device; A bottom clearance display device comprising: display means for displaying the position of a ship detected by the detection means and the water depth measured by the depth sounder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19482384A JPS6173012A (en) | 1984-09-19 | 1984-09-19 | Bottom clearance display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19482384A JPS6173012A (en) | 1984-09-19 | 1984-09-19 | Bottom clearance display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6173012A true JPS6173012A (en) | 1986-04-15 |
| JPH0420123B2 JPH0420123B2 (en) | 1992-03-31 |
Family
ID=16330843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19482384A Granted JPS6173012A (en) | 1984-09-19 | 1984-09-19 | Bottom clearance display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6173012A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6375611A (en) * | 1986-09-19 | 1988-04-06 | Japan Radio Co Ltd | Depth-of-water display apparatus |
| JPS6446244A (en) * | 1987-08-12 | 1989-02-20 | Matsushita Electric Ind Co Ltd | Optical disk |
| JPH08282585A (en) * | 1995-04-14 | 1996-10-29 | Eagle Syst Eng Kk | Underwater obstacle detecting device of vessel |
| EP1247237A1 (en) * | 1999-10-14 | 2002-10-09 | Brian Francis Shannon | Vertical reference for waterway navigation channels |
| JP2004226392A (en) * | 2002-11-25 | 2004-08-12 | Royal Kogyo Kk | Fish finder |
| JP2007050759A (en) * | 2005-08-18 | 2007-03-01 | Ocean High Technology Institute Inc | Hydrographic chart information processing method, its information system, its information program, and recording medium |
| JP2007101512A (en) * | 2005-10-07 | 2007-04-19 | Arc Geo Support Co Ltd | Exploration apparatus for fresh water region and sea water region |
| GB2474715A (en) * | 2009-10-26 | 2011-04-27 | Brian Leslie Russell Stannah | Aiding navigation of a marine vessel in a tidal region |
| JP2011165189A (en) * | 2010-02-08 | 2011-08-25 | Korea Ocean Research & Development Inst | Electronic marine chart update system changing with difference of tide |
| JP2013246130A (en) * | 2012-05-29 | 2013-12-09 | Japan Radio Co Ltd | River milemarker display system |
| JP2016099198A (en) * | 2014-11-20 | 2016-05-30 | Ｊｍｕディフェンスシステムズ株式会社 | Sailing support device |
| US9875564B2 (en) | 2012-12-07 | 2018-01-23 | Bae Systems Plc | Map display device and map display method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5387259A (en) * | 1976-11-17 | 1978-08-01 | Lapij Victor J | Automatic system for processes relative to ship navigation* navigation technique* and ship steering |
-
1984
- 1984-09-19 JP JP19482384A patent/JPS6173012A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5387259A (en) * | 1976-11-17 | 1978-08-01 | Lapij Victor J | Automatic system for processes relative to ship navigation* navigation technique* and ship steering |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6375611A (en) * | 1986-09-19 | 1988-04-06 | Japan Radio Co Ltd | Depth-of-water display apparatus |
| JPS6446244A (en) * | 1987-08-12 | 1989-02-20 | Matsushita Electric Ind Co Ltd | Optical disk |
| JPH08282585A (en) * | 1995-04-14 | 1996-10-29 | Eagle Syst Eng Kk | Underwater obstacle detecting device of vessel |
| EP1247237A1 (en) * | 1999-10-14 | 2002-10-09 | Brian Francis Shannon | Vertical reference for waterway navigation channels |
| EP1247237A4 (en) * | 1999-10-14 | 2003-02-05 | Brian Francis Shannon | Vertical reference for waterway navigation channels |
| JP2004226392A (en) * | 2002-11-25 | 2004-08-12 | Royal Kogyo Kk | Fish finder |
| JP2007050759A (en) * | 2005-08-18 | 2007-03-01 | Ocean High Technology Institute Inc | Hydrographic chart information processing method, its information system, its information program, and recording medium |
| JP2007101512A (en) * | 2005-10-07 | 2007-04-19 | Arc Geo Support Co Ltd | Exploration apparatus for fresh water region and sea water region |
| GB2474715A (en) * | 2009-10-26 | 2011-04-27 | Brian Leslie Russell Stannah | Aiding navigation of a marine vessel in a tidal region |
| GB2474715B (en) * | 2009-10-26 | 2013-09-18 | Dynamic Marine Data Ltd | Navigation device, networked apparatus, method and computer program for aiding navigation of a marine vessel |
| JP2011165189A (en) * | 2010-02-08 | 2011-08-25 | Korea Ocean Research & Development Inst | Electronic marine chart update system changing with difference of tide |
| JP2013246130A (en) * | 2012-05-29 | 2013-12-09 | Japan Radio Co Ltd | River milemarker display system |
| US9875564B2 (en) | 2012-12-07 | 2018-01-23 | Bae Systems Plc | Map display device and map display method |
| JP2016099198A (en) * | 2014-11-20 | 2016-05-30 | Ｊｍｕディフェンスシステムズ株式会社 | Sailing support device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0420123B2 (en) | 1992-03-31 |
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