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Old 14-09-2013, 08:16   #61
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Re: Why AIS?

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Originally Posted by barnakiel View Post
!

Must have a look. Stopped using Fugavi some time ago but still have the software on a CD.

Does it filter the screen content (the displayed mobiles) at the same time?

b.
Again from memory, I don't think it filters the view.
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Old 21-09-2013, 07:00   #62
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Re: Why AIS?

Look what happens, go away for a few days, and return to a book full. The boat we will be taking is new to us. We are buying a '84 S-2 9.2c. Finishing up with transfer of title,etc. now. Will start outfitting soonest. List of equipment is for gps/chart. is Lowrance HDS 7 gen 2 touch along with the lowrance radar. I believe I will just make my own reflector. Have also a garmin,unknown model as it came with the boat,w/ lakes chip installed. A lowrance 5300with navionics chips will be at nav. station. A hand-held gps lowrance as my last ditch unit. With all this just did not know if AIS really needed. I am a coward when it comes to other boats, but a poor coward. Trip will be from Superior,Wi. down lake Mi. to the big ditch to Mobile,Al. I have been told radar is a waste of money,but still bought it. Just looking for other's answers. I have not read 2nd page of responses, will do so now. Thank you all for replies. Bob
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Old 21-09-2013, 07:42   #63
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Re: Why AIS?

Two days down the Illinois, and the AIS has picked up 4 big tows with their names before they came steaming round the bend. Its also come in handy in the congested places to see which tows are moving and which are tied off. I also note that about half the loopers have transponders.
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Old 21-09-2013, 07:54   #64
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Re: Why AIS?

Donradcliff: I am on Kentucky Lake and am heading down to Mobile leaving on October 6. I made the trip in 07 with radar, but no AIS. We used radar everyday because you will get caught in fog unless you spend a lot of time sitting. If you are just making a leisurely trip, then AIS will be your dominant aid.

I have had AIS for a little over a year and I am looking forward to knowing where the tows are as we get into the lower Tennessee and the Tenn-Tom. With AIS I can see the tow a long way off, connect with it on radar using MARPHA when closer, and have the best of both worlds.

I think AIS will also be pretty valuable in helping to plan the days schedule as we go along. Being able to see tows a long way off will give us an idea how the locking through is going to work. We are second behind the tows locking through, so knowing when and where they are relative to the locks will be very helpful information.

Perhaps we will run into you on your trip down. We and another sailboat, Friday's Harbor are leaving Lighthouse Landing on October 6.

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Old 21-09-2013, 08:12   #65
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Re: Why AIS?

We needed a new VHF and bought the Standard Horizon one with AIS. It even displays on the remote mic. Great addition to radar and our eyes.
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Old 21-09-2013, 08:27   #66
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Re: Why AIS?

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We needed a new VHF and bought the Standard Horizon one with AIS. It even displays on the remote mic. Great addition to radar and our eyes.
I've had that model for a couple of years now (with the remote); it's a great piece of gear.
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Old 21-09-2013, 08:37   #67
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Re: Why AIS?

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I've had that model for a couple of years now (with the remote); it's a great piece of gear.
It sure is! I love the simplicity of the display and the fact that we did not need to use an antenna splitter, or separate antenna when setting it up.
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Old 21-09-2013, 11:05   #68
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Re: Why AIS?

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... I believe I will just make my own [radar] reflector. ...
Most radar reflectors rely on the corner-reflector principal, where the three surfaces are at exactly 90 degrees to each other. Any error in these angles results in the reflected signal being sent in the wrong direction (i.e. not back from where it came). There's no reason you can't build a well-functioning reflector, but do be sure to get the angles right. And do make it big enough. Those tiny "Mobri"-style reflectors are virtually useless. The reflector surfaces need to be significantly larger than the radar wavelength, which is about 3cm. Big ships also use 10cm wavelength radars for longer range.
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Old 12-10-2013, 06:47   #69
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AIS is wonderful to see the large ships that CAN'T avoid you. In a heavy commercial traffic area, which is where we are, it is really helpful.

Also, when subs come in to San Diego, you want to know it's military. They take exception to close passes...

Jeff
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Old 12-10-2013, 07:13   #70
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Re: Why AIS?

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... Also, when subs come in to San Diego, you want to know it's military. They take exception to close passes...
I've found that in most cases Navy ships don't transmit AIS (but they certainly receive it). Coast Guard, and "Navy Sealift" ships usually transmit. Occasionally I see an active Navy ship transmitting AIS, but much more often they are silent.

(This is the U.S. Navy I'm referring to.)
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Old 12-10-2013, 07:38   #71
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Re: Why AIS?

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I've found that in most cases Navy ships don't transmit AIS (but they certainly receive it). Coast Guard, and "Navy Sealift" ships usually transmit. Occasionally I see an active Navy ship transmitting AIS, but much more often they are silent.

(This is the U.S. Navy I'm referring to.)
We came into Hampton Roads a couple of weeks ago and a US Navy sub with two escort boats all had AIS on. Mostly, I see US Navy boats without a transmitting AIS, so this was the exception.
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Old 12-10-2013, 13:52   #72
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Re: Why AIS?

Been away for awhile. Thank you all for responses. Went ahead and bought a ipad 4 and got the boat beacon app(ais). Seems to be ok, but we are 250 miles from the boat now,it is on the hard for the winter anyway. Been playing some with ais, seems ok. Have radar purchase on next to buy list. We needed(I was told)the ipad, and hopefully this will cover need. Looked at the standard horizon 2150, but am really in no need for new radio, and seems from what I am told this is also a transmitter. This I cannot prove yet. Thanks to all again, will keep info coming as season progresses next spring as we head onto the great lakes towards the gulf.
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Old 12-10-2013, 14:06   #73
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It's not okay as a reliable ais receiver. You can get cheap receivers that will link to a chart plotter or laptop. Nice add as a back up chart Kit but thinking your using it as a AIS is not real.
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Old 12-10-2013, 15:08   #74
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Re: Why AIS?

I know what you are saying. I realize that the ipad would not be as good as an expensive unit, but just how far is one to go? Big vessels do transmit, as I have been finding out today. Sitting in my easy chair and watching numerous boats all over the world. Panama,suez,europe,etc. Problem is not the BIG boats, but the little 50 mph fools that have nothing more than a flashlight for transmitting anything. As you said, it will be a help. I will be interested in seeing how much better(if any) the 2150 standard horizon (I was going to buy) will be next spring when I will be able to compare against. Until then, thanks, Bob
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Old 12-10-2013, 15:21   #75
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At least the 2150 will have local real time reception. Not reliant on a tower picking it up and then using cellular to get you the ships position.
I am going to upgrade to a transponder. Maybe when I do a cf member would like my receiver at a discount.
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