Arrival Radius Ecdis
Beverly Friddle
If there is a fixed object near the wheel over position from which radar bearing/range or visual bearing can be taken, we need to define the wheel over position with respect to bearing/range from this object.
Capt. Rajeev Jassal has sailed for over 24 years mainly on crude oil, product and chemical tankers. He holds MBA in shipping & Logistics degree from London. He has done extensive research on quantitatively measuring Safety culture onboard and safety climate ashore which he believes is the most important element for safer shipping.
Plotting interval is not only about plotting of ship's position on ECDIS, it is also about OOW checking if the ship is proceeding as planned. So even if the GPS position is being plotted automatically, PPI need to be mentioned.
Rajeev, that is just a bureaucracy for insurance houses... indeed... so OOW does not have other jobs other to plot the position? OOW is continuosly monitoring the vessel movement through water, this is just additional distract to reduce attention
Great article sir! Nicely explained. One question sir, for position fixing is there a criteria for position fixing with regards to the distance of fixed objects observed visually or by radar? Or what is the maximum allowable distance for fixing position?
AIO is basically the computerized version of T&P notices and other navigational warnings, this is where the OOWs diligence in checking received EGC and navtex messages come in. When no AIO overlay is available, be sure to check all sources available for possible warnings and notices in the area, plot them accordingly, file and affix signature. It is the officer's responsibility to exhaust all approved references in keeping ENCs up to date.
Nice article. Regarding the PI topic: what you have plotted on ECDIS is not a PI; it is a kind of user symbol. A PI "travels" together with the vessel. There is the info necessary to set up the Radar display for the respective PI. About the No Go Area topic, the ENC provides sufficient info to inform the user (OOW) that there is an area you must avoid. We may observe the perimeter on chart. There is no need to additionally write "No go". We just need to "interogate" the chart; of course I agree we must write "no go" where the chart doesn't say that and we cannot go into that; for instance a draft restriction ( VLCC case). Very nice and useful article.
YOU ARE SO STUPIED.IF YOU STEALING THE ARTICLE AND SEND IT TO YOUR FLEET,MENTION THE ORIGINAL AUTHOR AT LEAST.AND DO NOT SIGN AFTER LIKE YOU WROTE IT BY YOUSELF.CAPT Rajeev Jassal THIS GUY STOLE YOUR ARTICLES WITHOUT MENTION YOUR NAME.
Excellent blog sir... This contract i was new to jrc ecdis... I have one query regarding PI on jrc ecdis... How can we monitor PI during our voyage on jrc ecdis... Since in model 901 B Jrc i couldnt find the PI lines available... But on on furuno we had option for that.. . So after drawing PI on usermap how can we monitor effectively when passing close to that object on jrc ecdis...
I share the same view as Mr. Kumar but don't know whether our understanding is correct. Can Mr. Rajeev Jassal or any other gentleman confirm to us or leave your comments? The object used as the reference for PI will deviate from the index line on Radar whenever the ship deviates from her course lie. Will the same thing happen also on ENC? If the answer is 'yes' plotting PI on ECDIS makes some sense; otherwise, giving more meaningless workload to OOW only, I guess. You gentlemen's comments are welcome. Thanks a lot.
Dear Capt Rajeev Jassal, First of all I appreciate with you kind consideration regarding this education articles. I have started to read all of them one by one with caution. Regarding this article as a Second officer who learnt navigation on ECDIS , I want to mention that we need to call 'Position Verification" rather than calling position intervals or fixing anymore. Due to real time navigation option of ECDIS we dont need to think or verify the current ship position continuously. Checking HDOP of GPS every 15 min while doing coastal navigation which can be supported by Radar fixes and PI's will be more than enough to clarify ships position.
Dear Sir, thanks for the nice article in this wonderful website. One small thing I would like to mention though. Those sharing options (Fb, tweeter etc.) are overlapping the article and obstructing the view. Would you kindly relocate them?
Very insightful description. However, are the ECDIS units required t be independent of each other? If, so then position fixing and other changes have to be carried out on both separately which takes time and focus away from watchkeeping. If not, then tendency is, not to verify that the other unit is updated accordingly...Pls clarify......
Good article sir. Wheel over and turn radius should be taken more into consideration. People forget that they are not escorted by tugboats from port to port and sometimes create passage plans with ROT 40 by not editing turn radius or speed
(1) Can anyone explain me step by step how to do the monthly back up of ecdis? (2) How to send the test message in SATCOM and also "RCC drill" format . Because when i am sending the test message in the ship email id it showing the status "Delivered" , but really i am not receiving any test message. say how i can solve this issue? please help
Dear sir i have some queries1. What is arrival radius in Ecdis and how much we should keep?2. Shall we keep XTL limits more or less...like for open sea We can keep 1 mile or 0.50 miles also, how to decide what we should keep??3. In ECDIS in rta format WOL is already marked but in route with file rtn, arrival radius is given ...so first explain which format we should use and why? And if we use rtn format where arrival radius is given so in that case we nees to mark WOL by user map???
good day sir! thanks to you better world has made on maritime! it is out of topic! but im so curious about the amended passage planing procedure.all passage plans are have been made berth to berth. what if modifications are made during the voyage? do i have to create all waypoints that already passed before? i think amended passage plan should be made from clsoest waypoint to berth. i cant find any instruction about this on B.P.G, B.T.M. etc... can you tell me where can i find details among the international rules or guidance
At point 4. NO GO Areas - correct Shallow Water Contour / Shallow Contour and write Safety Contour to avoid confusions. If you cross Shallow Contour, you are aground. You can cross Safety Contour if you are aware of the Safety Depth.
GPS Visualizer's Geographic Calculators page has a form that allows you to draw a circle of any radius around a specific latitude and longitude. However, if you want to draw circles around multiple points using the Calculators page, you'd have to save all of the coordinates separately and then upload them to a map form.
But there's an easier way to do it: if you go to the map input form and supply a "circle_radius" or "range_ring" field in a manually-created waypoint file (plain text or a spreadsheet; see the tutorial for more info), you can simultaneously draw circles around multiple points. If you separate a list of distances with commas (e.g., "10mi,20mi,30mi"), you can even draw multiple rings around multiple points; see the second example on this page.
This example shows data from three seismographs that all recorded an earthquake. We know the locations of the three recorders, and the great circle distance from each station to the epicenter of the tremor (the distance is calculated using the time lapse between the arrival of different kinds of earthquake waves), so we should be able to triangulate its position. By drawing a circle of appropriate size around each of the points, we can visually locate the place where the three circles intersect: it's east of the JRO station and north of TIMB, a few kilometers south of Mt. Adams (zoom in).
For this map, let's say we want to visualize the flying range of a couple of airplanes from various airports. We'll look at ranges of both 500 and 800 nautical miles; we can do that by simply separating the ranges with commas in the input file. (Note that if your entire file is comma-delimited and you want to draw multiple circles, you must enclose the radii in quotes, or the fields won't line up.)
Because we haven't supplied color values, GPS Visualizer automatically colorizes the "tracks" the same way it would GPS tracks, along a spectrum from red to violet. Also note that the circles don't LOOK like circles because we're looking at a round earth on a flat map... but the positions are correct with respect to the background.
Masters wanting to obtain a pilotage exemption for any Flinders Ports port will need to comply with Department for Infrastructure and Transport (DIT) requirements and necessary examinations, including:
Candidates are to contact Flinders Ports to arrange a time with a Flinders Ports Pilot to undertake the assessment. Flinders Ports will generate a letter of recommendation to DIT and the pilot exemption certificate will be approved.
The below tables are the waypoints used by Flinders Ports pilots for entry and exit from Port Adelaide. These are the waypoints for an ECDIS system. The pilot will select from one of the three possible routes for arrival and departure.
Masters of ships are encouraged to use these waypoints for passage planning purposes. The waypoints must be entered accurately and in particular the turn radius is important to show the track that the vessel is expected to take.
Use these waypoints for any vessel expecting to enter the channel between beacons 9 and 11. Normally for vessels with drafts less than 9 meters (plus an allowance for tide) and vessels transiting to Port Adelaide (Inner Harbor).
Vessels up to 265 meters LOA can swing in number 6 swinging basin immediately off the passenger terminal at number 2 berth. Number 6 swinging basin is 410m wide but some depths are not entirely assured and hence local knowledge is required. Vessels which can safely navigate the 10 meter passage can be safely swung in this area.
64591212e2