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AIS
Apr 21, 2015 15:17:39 GMT
Post by vasko on Apr 21, 2015 15:17:39 GMT
May be a stupid question , but how the information from the AIS class B in the end goes to the internet and the boat can be seen in www.marinetraffic.com/ in the end ? I'm trying to decide between AIS B Transponder and the SPOT device... ( I already have AIS receiver)
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AIS
Apr 21, 2015 15:34:39 GMT
Post by jlasail on Apr 21, 2015 15:34:39 GMT
When you are transmitting from an AIS transponder, whether it is a Class A or Class B, as soon as you are in proximity (<10nm to 15nm for a class B and a good antenna) of a coastal station equipped with an AIS base station and antenna, your position, name....etc... will be broadcast, and be visible on this site, as long as that station/country is providing its data to this site. This is not the case for some countries which is why there are dark zones. There are no subscription fees for that service. JL
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AIS
Apr 21, 2015 16:59:02 GMT
Post by ianpowolny on Apr 21, 2015 16:59:02 GMT
Vasko, we have an AIS transponder. Our kids use it to see where we are. It seems to work well but as stated there are some dark areas. I'm not sure it's essential but it keeps the family happy. Our son has Marine Traffic to send him an email when we depart or arrive. Ian
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AIS
Apr 21, 2015 18:09:19 GMT
Post by hoppy on Apr 21, 2015 18:09:19 GMT
Here is how marinetraffic get the AIS info www.marinetraffic.com/en/p/expand-coverageand for ships out of VHF range, there is also Satellite AIS. I'm not sure if class-B transponders can be picked up and it looks like you have to pay to view it www.marinetraffic.com/en/p/satellite-aisAIS and SPOT are to very different things... The advantage of an AIS transponder is that other boats in your area can see you. This I think is very important as it make it a lot easier for a large ship to spot the small yacht it's going to run down so hopefully that will change their course SPOT, Yellowbrick (YBtracking), Delorme and others are great for family and friends to keep track of where you are and can allow you to communicate with text messages, but from a safety point of view, all they add on top of what a GPS equipped EPIRB is the text ability. If it's a safety thing, get the AIS first. If it's just a family and friend tracking thing, still get the AIS first ;-) On the satellite tracking/text devices topic, I am less than impressed by SPOT for yachting. My dislikes of SPOT are - Coverage is not global www.findmespot.eu/en/index.php?cid=108 Maybe I'll never get out of the coverage, but my sort of dream of sailing to Aus would take me out of the area (YB/Delorme use irridum, so global) - Battery life is much less than YB and SPOT is not waterproof if connected to power whilst YB has a waterproof connector so it can be fixed mounted but for me, the big problem with SPOT is that their web tracker site is crap for sailors - on one page you can only see the last 50 positions - and for each position you only see the position, date and time For YBtracking - you can see every position report or just those within a date range. This is customisable, so you can show a whole circumnavigation or perhaps a selected summer - at each position you can see the course, speed, height and temperature As a comparisson, this is the SPOT page of a sailor from another forum who is sailing from Malta to Portugal share.findmespot.com/shared/faces/viewspots.jsp?glId=0LChtdnmfTp46rEnzWobs8FUZlvKznf5oThis is my YBTracking page my.yb.tl/Jessabbe/Currently as I am not onboard I have set it to default to all positions since I bought it. At the top left corner where it says "all time" you can select from my predefined "events". Once I am onboard I will change the default to 2015 The Delorme device looks good, but I know very little about it.
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AIS
Apr 21, 2015 21:56:26 GMT
Post by sitara on Apr 21, 2015 21:56:26 GMT
I have fitted an AIS transponder, and as Hoppy says ships on which AIS Class A is mandatory, and other vessels equipped with AIS can see you. I like the idea of an alarm going off on the bridge of a ship if I an a tiny blip on the ocean in front of it!. Another advantage of AIS (transponder and receiver) is that you can obtain closest approach distances and time to closest approach which will allow you to tweak your course early if necessary to keep clear. And yet another is that AIS will give you the ships name so that it is easy to set up VHF communication if needed.
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AIS
Apr 21, 2015 23:12:16 GMT
Post by iancymru on Apr 21, 2015 23:12:16 GMT
There is also an app for your mobile phone you can use to show your position on AIS sites such as Marine Traffic AIS live etc. Its called Boat Beacon which good for showing those at home for your position or friends on their boats using Marine traffic but beware you will not be shown on a boats or ships AIS set. Also acts like an interactive Marine Traffic site in that it can give CPA alarms etc. Obviously only works while you in cell phone coverage.
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AIS
Apr 22, 2015 6:08:31 GMT
Post by sailbleu on Apr 22, 2015 6:08:31 GMT
This may sound quite hard and intrusive , but as an AIS transponder owner myself I believe the presence of a transponder should be mandatory on all ships sailing outer waters. It doesn' t have to be an A-class , as long as you mount the antenna as high as possible. The benifits of having one are numerous and priceless towards your own and others safety. As mentioned , famely and friends can track you , although I think , with regards to prvacy , there should be an option on those online tracking services like marine traffic , vesselfinder etc that allow you to get off the grid. The alternative is switching off the transmission which also means you can't be seen by other boats.
Transponders are getting cheaper and cheaper , way to go to persuade more boaters to install one.
Regards
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AIS
Apr 22, 2015 7:33:00 GMT
Post by vasko on Apr 22, 2015 7:33:00 GMT
hoppy, SPOT: I have a friend who is using SPOT too ( he is currently travelling from Malta to Preveza) and can be seen here : share.findmespot.com/shared/faces/viewspots.jsp?glId=0nFBLxMcbSWcj1eDSqcDIZByat7KqElGiI agree I'm not impressed with SPOT and my friend complains that he need to restart something every 24h... YB Tracket : looks very impressive and useful - I cannot figure out what is the exact price : price of the unit price of subscription price of credits and the calculation seems like - let say I want one tracking message every 10 minutes for 3 months unit price + subscription for 3 months ( e.g. 3 x 8 = £24 ) + one credit per position (6 times per hour x 24 per day x 30 for month x 3 month = 6 x 24 x 30 x 3 = 12960 credit = £500+ e.g. it seems to me that I need to pay about £550+ for 3 months tracking for ongoing usage - which is about 5 years subscription for SPOT...and seems worth to investigate STOP more in deep e.g. there is a web site which can actually pull your uopdates from spot and plot your vessel on google map with no limits and it is free ( in worse case scenario I can spend 2-3 days and build it myself AIS: as I already have AIS receiver ( ST MATRIX AIS / GX2200E ) and I'm happy with it and I'm looking at only AIS transponder and so far I have found two viable options : www.aliexpress.com/item/Marine-AIS-Transponder-w-SOS-Emergency-Button-HA-102/2044702739.htmland one more out-of-the-blue idea to use a AIS beacon for fishing net and mount it on solar panels arch it has all encapsulated in it antenna GPS etc. and works about 400h on one charge. www.aliexpress.com/item/high-quality-marine-ais-buoy-gps-tracker-for-fishing-net-beacon-ais-transponder-signal-more-than/32301637461.htmljuts got the details from the factory and I'm really impressed: ------ *Voltage shown on ais marine gps screen,incharge the battery on time to avoid loosing the ais buoy *With software to change the ais buoy information,such as Name,MMSI,Nationality,Latitude&Longitude.RNG,BRG,COG,SOG,BRG,Length&Width,etc *Use as fishing net buoy for tracing the fishing net location *Use as ais marine gps unit to transmit the ship information *Long transmit distance *Long working hours *Waterproof AISTransmit frequency AIS1,161.975 MHz; AIS2,162.025MHz Output power 8w Modulation mode 25KHz GMSK Frequency interval 25KHz Broadband 25KHz Antenna none built-in Signal transmitting distance >12(nm)---still improved the quality stability to be more better Positioned update 2.0minutes(adjustable) Bit rate 9600b/s+50ppm(GMSK) GPS 20 channels Battery Type Lithium battery 6000mAh rechargeable (can use extra backup battery) Working hours 680hrs Voltage 7.4V (net sounder voltage can be shown on the AIS Screen) Working Environment (-20℃-+60℃) Waterproof IPX7 Product Color Orange LED color Red Size (L*W*H)14*14*22cm gift box; Antenna:80cm Net weight: 1kg Packing size gift box:13.5cm*13.5cm*22cm 12pcs one big carton size:43.2*28.5*82.2cm Gross weigh 0.9KG Packing List "1.Ais buoy-1PC 2.Charger-1PC 3. User Manual-1pc 4.Antenna-1pc ---------------------------------------------------------
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AIS
Apr 22, 2015 7:54:26 GMT
Post by vasko on Apr 22, 2015 7:54:26 GMT
Hoppy, FYI : looking at your tracks it looks like you haven't been in : Assos - Kefalonia Kioni - Itaka Zakinthos town - Zakinthos Palairos - oposite Nidri - main land all this are "must see" in the Ionian
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AIS
Apr 22, 2015 9:31:37 GMT
Post by dbostrom on Apr 22, 2015 9:31:37 GMT
Agree w/Sailbleu. Corrected vision is mandatory for driver's licensing; AIS is a kind of visual correction as well. Tie the data stream into your plotter/mfd, set up CPA threshold alarms, get the full benefits. As an owner of a boat in charter AIS is a bit of mixed bag; I can spy on guest skippers but sometimes that's not a good thing. If only crab pots had to be AIS equipped as well then things would be much easier for the helmsman in our part of the world.
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AIS
Apr 22, 2015 9:55:26 GMT
Post by hoppy on Apr 22, 2015 9:55:26 GMT
There is also an app for your mobile phone you can use to show your position on AIS sites such as Marine Traffic AIS live etc. Its called Boat Beacon which good for showing those at home for your position or friends on their boats using Marine traffic but beware you will not be shown on a boats or ships AIS set. Also acts like an interactive Marine Traffic site in that it can give CPA alarms etc. Obviously only works while you in cell phone coverage. It's great if you see an interesting ship in the distance and want to know what it is, but is crazy to use a phone AIS app for anything serious
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AIS
Apr 22, 2015 10:20:03 GMT
Post by hoppy on Apr 22, 2015 10:20:03 GMT
and the calculation seems like - let say I want one tracking message every 10 minutes for 3 months unit price + subscription for 3 months ( e.g. 3 x 8 = £24 ) + one credit per position (6 times per hour x 24 per day x 30 for month x 3 month = 6 x 24 x 30 x 3 = 12960 credit = £500+ e.g. it seems to me that I need to pay about £550+ for 3 months tracking for ongoing usage - which is about 5 years subscription for SPOT...and seems worth to investigate STOP more in deep e.g. there is a web site which can actually pull your updates from spot and plot your vessel on google map with no limits and it is free ( in worse case scenario I can spend 2-3 days and build it myself If you use it like that, then it is expensive. One tracking message every 10 minutes is overkill for cruising on a yacht. In the 3 years I'v had the YB, I have used 3687 credits. I seem to transmit every 20 or 30 minutes cruising in Greece and when I get to an anchorage/marina/town quay I turn it off. So that I don't forget to turn it back on, I always keep it at the nav station when it is off. If I was crossing an ocean which might take weeks, then I would probably change it to send positions every hour or 2, so a 3 week atlantic crossing would only use up 504 or 252 credits or a nonstop 12 month non-stop circumnavigation would use 8760 or 4380 credits
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AIS
Apr 22, 2015 10:32:48 GMT
Post by vasko on Apr 22, 2015 10:32:48 GMT
I've decided that 143 USD is good amount for a AIS gadget to play with and ordered one www.sz-shunhang.com/En/cpzsinfo1.asp?id=182 SH-098 beacon for fun will be with me next week and will let you know is it working/worth etc...
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AIS
Apr 22, 2015 10:34:32 GMT
Post by hoppy on Apr 22, 2015 10:34:32 GMT
If only crab pots had to be AIS equipped as well then things would be much easier for the helmsman in our part of the world. We can track down Vasko for some crabs As an owner of a boat in charter AIS is a bit of mixed bag; I can spy on guest skippers but sometimes that's not a good thing. "ignorance is bliss" Last year when I was laid up with a broken knee, my father and uncle took Jessabbe cruising. I kept track of them through both AIS and YB. The AIS kept dropping out as parts are just not covered for vessels with class B One day on YB I saw this Then when I finally made it to the boat I found the track on the plotter I mentioned it to my father and them admitted they had run aground
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AIS
Apr 22, 2015 10:36:37 GMT
Post by hoppy on Apr 22, 2015 10:36:37 GMT
I've decided that 143 USD is good amount for a AIS gadget to play with and ordered one www.sz-shunhang.com/En/cpzsinfo1.asp?id=182 SH-098 beacon for fun will be with me next week and will let you know is it working/worth etc... More importantly let us know your MMSI number so we can get some crabs
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AIS
Apr 22, 2015 10:42:24 GMT
Post by hoppy on Apr 22, 2015 10:42:24 GMT
Hoppy, FYI : looking at your tracks it looks like you haven't been in : Assos - Kefalonia Kioni - Itaka Zakinthos town - Zakinthos Palairos - oposite Nidri - main land all this are "must see" in the Ionian I'll keep those places in mind when I'm working my way south from Corfu
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AIS
Apr 22, 2015 11:19:46 GMT
Post by iancymru on Apr 22, 2015 11:19:46 GMT
I've decided that 143 USD is good amount for a AIS gadget to play with and ordered one www.sz-shunhang.com/En/cpzsinfo1.asp?id=182 SH-098 beacon for fun will be with me next week and will let you know is it working/worth etc...
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AIS
Apr 22, 2015 11:23:14 GMT
Post by iancymru on Apr 22, 2015 11:23:14 GMT
I look forward to seeing how you get on with it Vasko if it does the trick it will be a useful tool to have on board for the price. Invaluable in fog and night sailing.
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AIS
Apr 22, 2015 12:35:22 GMT
Post by vasko on Apr 22, 2015 12:35:22 GMT
I've decided that 143 USD is good amount for a AIS gadget to play with and ordered one www.sz-shunhang.com/En/cpzsinfo1.asp?id=182 SH-098 beacon for fun will be with me next week and will let you know is it working/worth etc... More importantly let us know your MMSI number so we can get some crabs Here it is VESSEL: ALFIL MAX. PERSONS ONBOARD: 6 MMSI: 235103371 CALLSIGN: 2HGA8
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AIS
Apr 22, 2015 13:02:22 GMT
Post by hoppy on Apr 22, 2015 13:02:22 GMT
I have watched many episodes of Deadliest Catch and 6 crabs is not good
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AIS
Apr 22, 2015 13:04:58 GMT
Post by hoppy on Apr 22, 2015 13:04:58 GMT
Just tried to look you up on marinetraffic but they don't find your MMSI. Maybe they only add you to their database once they have started receiving transmission with your MMSI
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AIS
Apr 22, 2015 13:11:26 GMT
Post by vasko on Apr 22, 2015 13:11:26 GMT
I guess too... BTW - when you go to Assos - keep in mind that the harbour is small and if there is a N or NW swell it enters in some extent - but is amazing place great miniature beach , great pubs etc. Kioni is my no.1 place in the Ionian !
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Post by zofiasailing on Apr 22, 2015 15:12:15 GMT
Vasko We'd support the view of other contributors that the AIS is a great asset for safety at sea. We too have had our location sometimes visible and sometimes not on the apps like Marine Traffic for the reasons already stated, which is why apps are no substitute for the real thing. Some sailors imagine that a free app is a clever alternative to spending money on a proper AIS. One problem we have with our Simrad AIS, (send and receive) is that we haven't found a way to (a) acknowledge a signal from a boat we might be travelling with to silence the alert, and (b) reduce the volume of alerts. As a result we have to switch our AIS off when it's too annoying. If other boats have this issue it might cause them to selectively switch off too which is probably not a good outcome overall. If researching the features of prospective AIS systems, the ability to confirm that you already know about a boat and are happy not to be continually alerted, and to be able to adjust the volume of alerts would be good in our view. We would welcome any thoughts/suggestion from others on this matter as it's the thing we actually dislike about our AIS! With regards family/ friends tracking we have a satellite communicator from Predictwind. It updates our position several times per hour and with accuracy to within 5 metres. Our 93 year old mum always knows when we are on the move and when we have arrived somewhere. Predictwind will also give you the code to include your position on a webpage etc. We have incorporated the code into our blog for this very purpose. Http://zofiasailing.blogspot.com.au. The satellite communicator additionally enables us to send and receive text emails if we wish. Cheers SV Zofia
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AIS
Apr 22, 2015 15:29:12 GMT
Post by vasko on Apr 22, 2015 15:29:12 GMT
Can you please elaborate on the PredictWind service ? which service you are using exactly, cost etc. ?
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AIS
Apr 22, 2015 20:09:57 GMT
Post by hoppy on Apr 22, 2015 20:09:57 GMT
Can you please elaborate on the PredictWind service ? which service you are using exactly, cost etc. ? Iridium Go perhaps... www.predictwind.com/iridium-go/
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