The way you taught us sir are so clear and easy to understand. We the aspiring to become a navigational officers are so thankful for your videos. Best regards from philippines.
Nice to see your content sir...Very knowledge worthy n useful.I am presently studying in 12th std saving all of your videos which will help me for the interveiw and for the whole career of mine.
Sir! If we are in ground stabilized mode and using relative vector.... and current is against us... and it will reduce our SOG.... then will it affect the length of relative vector??...Sir can you please answer
the question is, if u are both close to land and also u have traffic and collision avoidance is required, what is your set up regarding the stabilization and vector? nice content btw!
Even if you put ground stabilized mode, ARPA always gets feed of STW and not SOG. So CPA and TCPA won't change by changing stabilization of radar. In ground stabilization mode, ground vector is displayed to let you to know where is ship moving, however calculations by ARPA won't change because ARPA always gets the feed of STW ( Which doesn't get affected by current )
@@matrosnya7790 huge error !!! U won't use such an equipment If it has huge error where STW is showing 5 kts and SOG is showing 15kts unless u have strong currents , for the above problems you have to use SOG for approaching critical waters and for collision avoidance you have option to input STW manually in Radar/arpa ☺️
Annex 4 & 6 : Applies to all ships as sewage and pollution of air is produced by all types of ships. Annex 3 : Depends what type of cargo it is carrying whether packed or in bulk ..it depends on ship type.
Stw is to be used for collision avoidance. It's not mandatory , how ever it's the good practice to use so and during port approches or approaching anchorage we use SOG as ground vector takes consideration of Wind,current and lets us know where is ship dragging, also if their is error in speed log/speed log is inoperative than also we use SOG till the time equipment is rectified.
Im glad that you replied, thank you. And why is it so important to use STW? Can you give a one solid example from real life? There is a COLREG which explains the rules to avoid collision situations and as far as ARPA calculating same CPA and TCPA and all the rest regardless of speed input (as basically it uses range and bearing calculations) so why would you use relative speed log instead of absolute?
In simple words, relative speed is used to obtain relative vectors...in head-on situation When their is current and you use ground vectors, in radar it appears to be a crossing situation which is not true and if u use STW , that is relative vectors, than It will not appear as a crossing situation thus STW is used ☺️
@@matrosnya7790" if their is current " you will see the ship dragging in a cross direction...watch this video of mine to get a clear understanding czcams.com/video/Lor6lvrioiU/video.html
True trails, Relative vectors. Relative vectors of target will help you identify how the target is passing whether ahead of you, behind of you or its on a collision course.
@@SailorVikas same thing wanted to ask sir you already replied.. For navigation I keep north up true vector relative and trails true which gives clear view how other ship passing from you no need to check cpa by clicking on vessel.. Thqnx for making informative stuff.
Relative vector is ideal at sea ( assuming radar set at sea stabilised)....if relative vector of other ships point towards you than its risk of collision with cpa 0 and if the vector pass head of you than it means ship is bow crossing and if vector pass behind you than other ship is passing astern of you,...for port approaches and coastal sailing....true vector is ideal to know the drift of ship , wheather it's towards land or not ( assuming radar is set on ground stabilied), if you have any doubts regarding vector see my videos of ground and sea stabilsation and radar videos, everything will be cleared ...just listen carefully of what I say in video.
Watch in this playlist, their is one video with name WHY SPEED THROUGH WATER USED FOR COLLISION AVOIDANCE czcams.com/play/PLHMRo9UqDFq7iTmC59QP1JnVAOuvG5O97.html
The way you taught us sir are so clear and easy to understand. We the aspiring to become a navigational officers are so thankful for your videos. Best regards from philippines.
Thanks a lot ❤️🙏
You have made good videos for seafarers. Cheers, keep up the wonderful work vikas.
Nice video dada
This was best video I ever had on sog and stw thanks
😍😍
Vry helpful sir.. 🙏🙏
Thanks❤️
Really superb brooo....very well explained
👍
Thanks for your videos brother. Big help.
Welcome bro❤️
Really good explanation and thanks alot brother
Welcome 👍
Many thanks from the UK!
Welcome and all the best ☺️
Damn legend thank you!❤
Very good explanation. Thank you.
✌✌
Nice to see your content sir...Very knowledge worthy n useful.I am presently studying in 12th std saving all of your videos which will help me for the interveiw and for the whole career of mine.
Great, thanks , keep learning ❤️
Great explanation. Best regards from Poland.
Glad it was helpful!
many many thanks from Japan
Great ❤️
Thank u so much from 🇧🇩
Welcome
Thanks a lot bro... Radar is also known as a third eye...very important 🙏
Yeah right ❤️ thanks , keep learning ❤️
@@SailorVikas one request please make video on tide's and how to calculate?
Well noted 😊
Can you please teach us about TRS and synoptic charts to check weather. And how to keep vessel away from TRS? Thanking you
Yes, sure well noted !
Why does my ship not display vectors when using relative vectors in ground stabilization mode?
Sir! If we are in ground stabilized mode and using relative vector.... and current is against us... and it will reduce our SOG.... then will it affect the length of relative vector??...Sir can you please answer
Relative vector has nothing to do with current, you can set the length of relative vector at 3min, 6 min etc
the question is, if u are both close to land and also u have traffic and collision avoidance is required, what is your set up regarding the stabilization and vector?
nice content btw!
Even if you put ground stabilized mode, ARPA always gets feed of STW and not SOG. So CPA and TCPA won't change by changing stabilization of radar. In ground stabilization mode, ground vector is displayed to let you to know where is ship moving, however calculations by ARPA won't change because ARPA always gets the feed of STW ( Which doesn't get affected by current )
And what if your Doppler or mechanical speed log is having a huge error? Your arpa is showing the wrong cpa etc...?
@@matrosnya7790 huge error !!! U won't use such an equipment If it has huge error where STW is showing 5 kts and SOG is showing 15kts unless u have strong currents , for the above problems you have to use SOG for approaching critical waters and for collision avoidance you have option to input STW manually in Radar/arpa ☺️
Loved it sir 👍 one question.. To which ships does MARPOL annex 4,6,and 3 apply to?
Annex 4 & 6 : Applies to all ships as sewage and pollution of air is produced by all types of ships.
Annex 3 : Depends what type of cargo it is carrying whether packed or in bulk ..it depends on ship type.
@@SailorVikas thank you sir :)
@@reetbhattacharya7907 welcome mate❤️
Bro...when will be the true and relative vectors be the same?
Head on situation with no current
Vessel is ground stabilizer and put relative vector and what i get result?
What result you mean exactly ?
Ground stabilized will help u show ground vector of ur vessel.
Relative vector is of target vsls not ur ship.
Ok if its mandatory to use STW on ARPA, what about wind, current difference between targets, error in speed log? Then arpa not reliable?
Stw is to be used for collision avoidance.
It's not mandatory , how ever it's the good practice to use so and during port approches or approaching anchorage we use SOG as ground vector takes consideration of Wind,current and lets us know where is ship dragging, also if their is error in speed log/speed log is inoperative than also we use SOG till the time equipment is rectified.
Im glad that you replied, thank you. And why is it so important to use STW? Can you give a one solid example from real life? There is a COLREG which explains the rules to avoid collision situations and as far as ARPA calculating same CPA and TCPA and all the rest regardless of speed input (as basically it uses range and bearing calculations) so why would you use relative speed log instead of absolute?
In simple words, relative speed is used to obtain relative vectors...in head-on situation When their is current and you use ground vectors, in radar it appears to be a crossing situation which is not true and if u use STW , that is relative vectors, than It will not appear as a crossing situation thus STW is used ☺️
So in simple words if im using SOG and true vectors i will not understand that its head on and not crossing? I can't get it...
@@matrosnya7790" if their is current " you will see the ship dragging in a cross direction...watch this video of mine to get a clear understanding czcams.com/video/Lor6lvrioiU/video.html
sir..one doubt while using radar which vector is best aid for collision avoidance realtive or true sir...plz reply me
True trails, Relative vectors.
Relative vectors of target will help you identify how the target is passing whether ahead of you, behind of you or its on a collision course.
@@SailorVikas TKS SIR...
Welcome mate ❤️ Keep learning ❤️
@@SailorVikas same thing wanted to ask sir you already replied.. For navigation I keep north up true vector relative and trails true which gives clear view how other ship passing from you no need to check cpa by clicking on vessel.. Thqnx for making informative stuff.
@@amitchandel3148 welcome mate ❤️
Sir how are you? One question... What is constant radial turn?
Refer Bhatia book bro ..
Quiet lengthy to explain here
@@SailorVikas okay sir thank you :)
bro which vector is ideal at sea relative or true
bro can you please reply
Relative vector is ideal at sea ( assuming radar set at sea stabilised)....if relative vector of other ships point towards you than its risk of collision with cpa 0 and if the vector pass head of you than it means ship is bow crossing and if vector pass behind you than other ship is passing astern of you,...for port approaches and coastal sailing....true vector is ideal to know the drift of ship , wheather it's towards land or not ( assuming radar is set on ground stabilied), if you have any doubts regarding vector see my videos of ground and sea stabilsation and radar videos, everything will be cleared ...just listen carefully of what I say in video.
@@SailorVikas thanks a lot bro much appreciated
@@gavinpatrick755 ❤️❤️
Please avoid background music 🙏🏽🙏🏽
Sure
Sir why seastabilization is used for collision avoidance?
Watch in this playlist, their is one video with name WHY SPEED THROUGH WATER USED FOR COLLISION AVOIDANCE czcams.com/play/PLHMRo9UqDFq7iTmC59QP1JnVAOuvG5O97.html
@@SailorVikas sir same answer apply here also right sir . Now it's clear sir thankyou sir ...keep posting more sir
Yup
@@SailorVikas sir one more doubt we have to elaborate deeply when mmd surveyor asked like what you explained sir ..thanks
Mostly mmd orals are saying with confidence and one line answers....only few Questions require little detailing
India many talk 🐶