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Where Does NBDP Fit in GMDSS and How to Use It ?

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How to use NBDP Raise your hand if you think NBDP is more ignored equipment of GMDSS system. If I was with a group of deck officers right now, I am sure I would see many hands raised. NBDP is surely an ignored equipment. But it is ignored because NBDP is a dead horse, hardly used and gathering dust at one corner of the bridge. Even only few coast stations these days have the NBDP facility. All agreed but if we have this equipment on board, we must know about it. That remains the logic for all the equipments on board. So in this post, I will go through all that one may have to know about NBDP. Let's start. What is NBDP ? In simple terms, NBDP (Narrow Band Direct Printing) is a telex. A way to communicate with text rather than by voice. It is said that NBDP was introduced in the GMDSS to help seafarers whose first language was not English. They did not have to speak to broadcast their distress message, instead they could type and send. If we go by the literal meaning of the NBDP, then we can understand that It uses narrow band width for transmitting the message and When a message is received, it prints the message on the screen and on the printer connected with NBDP So what can NBDP do.. NBDP can send and receive text messages with to and from a single station NBDP can transmit text message stored in the equipment (SD c...

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Comments (67)

  • Capt. Prashant D. Kulkarni January 30, 2017
    Very well explained. These notes are useful for GMDSS exams , on board operations , PSC and vetting inspections.
    3
    Rajeev Jassal January 30, 2017
    Thanks Capt Prashant..
    sheelendra singh February 6, 2018
    rajeev sir i am thanking u for such knowledge, every time if i have any qus. i do look in to it. thanx for giving MY SEA TIME,
  • Aakar January 30, 2017
    NBDP has always been bit difficult to understand. Sir it was the best of all what i have read about NBDP.
    1
    Rajeev Jassal January 30, 2017
    Glad you liked it Aakar..
  • Neelkamal February 1, 2017
    Very informative,,,
    1
    Rajeev Jassal February 1, 2017
    Thank you Neel..
  • Abu Taiyeb md. Alimuzzaman February 4, 2017
    Liked it. Thank you sir
    1
    Rajeev Jassal February 5, 2017
    Thanks for reading Abu..
  • Mark February 27, 2017
    This is very important and most awaited :) thanks capt, more gmdss lecture to come
    1
    Rajeev Jassal March 28, 2017
    Thanks Mark..
  • arun raveendran March 10, 2017
    how do we come to know that , whether our vessel is fitted with NBDP
    1
    Rajeev Jassal March 28, 2017
    By actually looking at the bridge equipments. Also list of all the radio equipments provided is there in Form R of the safety radio certificate.
  • Oli Hansen March 21, 2017
    Superb article, sir!
    1
    Rajeev Jassal March 28, 2017
    Glad to hear that Oli..
  • willow25 March 24, 2017
    good day sir I would like to ask how to set station list and from where should I get the ID for shore station. many thanks
    1
    Rajeev Jassal March 28, 2017
    It is in the ALRS...
  • melvin April 18, 2017
    Dear sir, gd day, are you familiar with jrc jue 85 equiptment how to test nbdp ? Thanks in advance.
    1
    Mike Malloy July 19, 2017
    The JUE 85 is a Sat C system. The concept of NBDP does not apply, as in HF/NBDP. True, the C system is sending data, and there is also a hand shake, between your system and the INMARSAT, but the best test is to send a TELEX routine, or an email. NEVER send a distress as a "test" message. Hope that helps.
  • John Ilaya July 2, 2017
    Very informative. I had been reading a lot from your articles during my stay on board and on my vacation time. Good Job sir!
    1
    Rajeev Jassal November 20, 2017
    Thanks John...
  • lib feng July 12, 2017
    Dear sir, very good article and many thanks! By the way, do you know is it needed to be printed for received DSC distress message? I didn't find it is required in the IEC61097-3 (DSC ). However I noticed there is such port in Furuno VHF stations. do you know in which scenario that the content of the DSC needs to be printed? I am a new engineer developing marine communication equipments. Thanks in advance!
    1
    Mike Malloy July 19, 2017
    DSC messages do not have to be printed. They are stored in a buffer inside the DSC, with the older messages deleted as the buffer is filled up with newer messages.
  • Makuhita Kulita August 16, 2017
    Exceptionally well discussed.
    1
    Rajeev Jassal November 20, 2017
    Glad you liked it Makuhita...
  • Harpal Singh September 17, 2017
    Very well explained. Thanks a lot.
    1
    Rajeev Jassal November 20, 2017
    Thanks Harpal...
  • Shaffin Thadathazhath October 24, 2017
    Well said sir...
    1
    Rajeev Jassal November 20, 2017
    Thanks, Shaffin...
  • Kemal Gürbüz November 19, 2017
    Well explained and useful,thank you.
    1
    Rajeev Jassal November 20, 2017
    Glad you found it useful Kemal...
  • sumit 2/0 November 25, 2017
    well explained .. all doubt cleared
    1
    Rajeev Jassal April 4, 2018
    Glad to know that Sumit...
  • R. Babu December 11, 2017
    Dear sir, wherefrom I can get NBDP Coast Station ID Number, channel number and frequencies for the coast stations of China, Japan, Australia and Philippines. Kindly help me. Thanks in advance.
    1
    tamil May 27, 2018
    ALRS you can find all these informations.
  • Abdullah Al Mamun December 12, 2017
    Well Explained Sir. Really Now-a-days NBDP is an ignored equipment. Remembered a lot of already forgotten info about NBDP. Thanks a lot Sir
    0
  • Abbas December 14, 2017
    Thank you once again sir.Found very helpful.Keep moving.
    0
  • Raju yadav December 28, 2017
    Very informative and well explaind.thx keep the good work
    0
  • VALTER January 6, 2018
    Well explained. Just most of telexes are use on F7 DE (from ICS) istead of HR
    0
  • Filip February 10, 2018
    very comprehensive!! by far the best explanation I`ve ever seen
    0
  • Swapn Panda April 6, 2018
    Very well explained, Sir. Could you please let me know the procedure for shore communication test on NBDP.
    0
  • Bart May 1, 2018
    Text need correction. NBDP is required in A3 (first concep x1) and A4 (x2). SOLAS chapter IV, regulation 9.3.1 is about Epirb.
    0
  • junie May 29, 2018
    i have nothing to say, two thumbs-up to you captain rajeev very well explained many thanks :)
    0
  • amit singh May 31, 2018
    How to test NBDP ship to ship? Plz explain the procedure. Jrc NBDP fitted on board.
    0
  • Raja October 10, 2018
    Please include the CANCELING A FALSE DISTRESS ALERT in HF/NBDP ( in case of FALSE transmit ).
    0
  • Ashish Mandola October 18, 2018
    Capt Rajeev This is the best explation for NBDP I have ever read in the past 10 years of my Sea career . Thanks
    0
  • 3/0 Ambadi November 8, 2018
    Short and precise,,,helmed me a lot,,,tnq sir
    0
  • Amit chauhan December 7, 2018
    very informative sir...you explain always in a simple way that i really like thank you for posting such a informative messages
    0
  • Steven January 28, 2019
    Amazing , amazing ! You hear this alot but you need to hear it again, this blog is probably the best online education tool I ever found as an officer in tanker fleet. Just discovered your blog and I spend every day reading for few hours after watch. Capt . I also recommend covering next topics if not covered already, 1) Auto-pilot maintenance and operation /testing 2) magnetic compass adjustment 3) tank cleaning procedures line up / chain of events 4) framo stripping /purging / line blowing 5) fluid behavior in pipes , pressure / better understanding 6) cop pumps operation / stripping 7) vessel IT/ systems explained vsat ,fbb Cisco/ servers.. 8) oxygen resyctiator explained
    0
  • Myat Naing July 9, 2019
    Thanks a lot, Cap.
    0
  • Jarnail Singh August 9, 2019
    Thank You Soo Much Sir Very Goodly Explain About NBDP & ARQ MODE & FEC MODE ????
    0
  • Mark October 24, 2019
    Hi. 1 observation. NBDP or satc is not requires until sea area A3. An MF set is adequate without NBDP functionality at sea area A2. Other than that, brilliant information.
    0
  • Akkaranat November 21, 2019
    Easy to understand thank you so much
    0
  • WHAT IS THE INTERVAL FOR TESTING NBDP ONBOARD ? November 25, 2019
    BP observation that when you do NBDP TEST AND WHERE ITS WRITEEN?
    1
    Alex February 9, 2022
    Hello, did you found the interval of the NBDP test and if YES, where written/referred..?
  • Naing Naing January 16, 2020
    Very Detail of explanation and easy to understand, thaks you so much Capt...
    0
  • Balbir Kumar January 19, 2020
    Excellent article...very well explained. Thank you so much sir.
    0
  • Ananyo Muhammad March 23, 2020
    Sir, I want you to know that I have read your entire blog and emerged as a great fan of your writing. Your write-ups are so transparent, detailed and most importantly, in layman language, making shipping knowledge understandable to even schoolgoers. Thank You for your efforts in educating so many people. Sir, a small request from me is that you write on all the functions of INMARSAT-C. I know many people who face huge difficulties in this field, including myself, and I would be ever so grateful to you if you please describe its importance in GMDSS and the process of using it in distress as well as in routine communication.
    0
  • Harjinder Singh May 6, 2020
    Very well explained sir...thanks alot for ur efforts..
    0
  • Mark July 4, 2020
    Hello, first thank you for your great article, I would like to ask this I'm in East African coast and the only station I know that support NBDP is in Asia, like Shanghai. I tried the 16MHz frequency to connect. But as expected its unable to it say its suspended, is this because I'm too far from the station? I'm trying to find for references as to how far are the theoretical reach of each frequency. Hoping you can enlighten me on this.
    0
  • Dragon July 18, 2020
    Thank you for your explanation. but, I have a question as to use sending telex NBDP, we need to register "Answerback code" for our equip as MF-HF NBDP. So, what is "answerback code"? and how do we get the answerback code to register for our equipment MF-HF NBDP?
    0
  • Patrick.Bunny September 8, 2020
    There are many ways to make money, but if you can't find the seeds that make money, you can't be a business
    0
  • Salim javed October 2, 2020
    Sir, can you please explain the procedure to do monthly test with coast stations and ship stations.
    0
  • Alfred December 30, 2020
    Such a relief, Good Explanation Capt.! I agreed too, Your First Sentence is a catchy one.,like raise your hand if you agreed. indeed NBDP left out at the corner even after your contract one or two touch would be ok.
    0
  • Capt Naseem February 22, 2021
    Very well explained sir...thanks alot for ur efforts very helpful keep moving
    0
  • Arif April 14, 2022
    Very well explained, as always done Sir. Your contribution is highly appreciated. If I may share/add for the benefit of young navigators: NBDP may also be used to receive Navtex messages by tuning on 518 KHz, in case Navtex is not in working order.
    0
Capt Rajeev Jassal

About Capt Rajeev Jassal

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.

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