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05-25-2018, 04:11 PM
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#1
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Senior Member
City: Cape Cod, MA or Fort Myers, FL
Vessel Name: Osprey
Vessel Model: Her Shine. Newburyport
Join Date: Dec 2013
Posts: 389
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AIS do you turn it off
Do you turn your AIS off? Apparently this vessel travels at 57 Kts ......on the Interstate...
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05-25-2018, 05:01 PM
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#2
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,131
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Unfortunately too many people leave them on while tied up at the dock. You get so many hits that you can tend to ignore them. I wired mine in with the MFD so when I dock and shutdown the AIS goes off.
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05-25-2018, 05:06 PM
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#3
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by Comodave
Unfortunately too many people leave them on while tied up at the dock. You get so many hits that you can tend to ignore them. I wired mine in with the MFD so when I dock and shutdown the AIS goes off.
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I really appreciate folks that do that.
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05-25-2018, 06:09 PM
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#4
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Guru
City: Southern Maine
Vessel Model: Prairie 36 Coastal Cruiser
Join Date: Dec 2012
Posts: 2,714
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I knew Massachusetts Drivers have a reputation, but... wow!
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05-25-2018, 06:13 PM
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#5
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Guru
City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
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Is ais a requirement over there?
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05-25-2018, 06:15 PM
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#6
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Moderator Emeritus
City: SEWARD ALASKA
Vessel Name: DOS PECES
Vessel Model: BAYLINER 4788
Join Date: Feb 2011
Posts: 6,263
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Mine, and most I’ve seen are on all the time.
Having it on does not create a problem, and can even provide a ownerr with a remote indication that all is well on his boat while he is away.
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05-25-2018, 06:23 PM
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#7
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Senior Member
City: Cape Cod, MA or Fort Myers, FL
Vessel Name: Osprey
Vessel Model: Her Shine. Newburyport
Join Date: Dec 2013
Posts: 389
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Quote:
Originally Posted by Simi 60
Is ais a requirement over there?
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Not with private ownership.
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05-25-2018, 06:28 PM
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#8
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,131
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Quote:
Originally Posted by Simi 60
Is ais a requirement over there?
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Commercial vessels and over 65’ have to have it. It is really awesome though and I would not go without it again. Crossing Lake Ontario the rain was coming down so hard the radar was in a white out. Saw a ship on AIS that was on a collision course with us. About that time the ship called us by name and told us that they were changing course to pass astern of us. Wonderful.
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05-25-2018, 06:30 PM
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#9
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by ksanders
Mine, and most I’ve seen are on all the time.
Having it on does not create a problem, and can even provide a ownerr with a remote indication that all is well on his boat while he is away.
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I disagree that leaving them on doesn’t necessarily create a problem. Having active AIS signals from boats that are not currently in operation can clutter up the AIS display in busy harbors reducing its effectiveness at its intended purpose, to help with collision avoidance.
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05-25-2018, 07:52 PM
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#10
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,131
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Quote:
Originally Posted by dhays
I disagree that leaving them on doesn’t necessarily create a problem. Having active AIS signals from boats that are not currently in operation can clutter up the AIS display in busy harbors reducing its effectiveness at its intended purpose, to help with collision avoidance.
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+++1
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05-25-2018, 08:21 PM
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#11
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Guru
City: San Diego
Vessel Model: Helmsman 4304
Join Date: May 2016
Posts: 2,005
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AIS signals on boats not in transit don't bother me much because they are in the marinas next to other boats that are not moving. Every marina in my area has about 5 boats per marina who keep their AIS on.
Agree, AIS is a nice tool. The ability to click on a boat when offshore to find out if its a 200 footer or a 20 footer can be helpful in the dark.
New boat is getting an 8 ft. AIS whip that should be up by next week.
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05-25-2018, 08:25 PM
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#12
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,818
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I turn mine off at the dock, but leave it on at anchor, in the mooring field. Or tied between dolfins before a lock. Have seen some bone head moves at night by other boaters. If I'm not tied to a dock, the AIS and anchor light are left on at night.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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05-25-2018, 08:41 PM
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#13
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Senior Member
City: Seattle, WA.
Join Date: Dec 2013
Posts: 127
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We turn ours off when we’re not underway, figuring why have something turned on when not needed.
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05-25-2018, 09:03 PM
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#14
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Guru
City: Sea of Cortez, Mexico
Vessel Name: Irene
Vessel Model: Nordhavn 40II
Join Date: Jan 2016
Posts: 1,234
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Another consideration for those that leave their AIS powered up while secured to shore...
AIS transmits in available "time slots". There is a pecking order for those slots. By securing your unit unless you are underway or anchored, you are allowing those navigating to use the time slots for the intended safety purposes.
Thanks to those who secure their units.
Best Wishes
__________________
Jeff
MV IRENE
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05-25-2018, 09:30 PM
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#15
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Guru
City: West Coast
Join Date: Apr 2014
Posts: 1,789
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Quote:
Originally Posted by IRENE
Another consideration for those that leave their AIS powered up while secured to shore...
AIS transmits in available "time slots". There is a pecking order for those slots. By securing your unit unless you are underway or anchored, you are allowing those navigating to use the time slots for the intended safety purposes.
Thanks to those who secure their units.
Best Wishes
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Are "time slots scare"? If not, does it matter? I leave mine on all the time.
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05-25-2018, 09:55 PM
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#16
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,608
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Quote:
Originally Posted by dhays
Having active AIS signals from boats that are not currently in operation can clutter up the AIS display in busy harbors reducing its effectiveness at its intended purpose, to help with collision avoidance.
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AIS is useless in the harbor. Too many people leave them on. Great idea like DSC but implementation and lack of control limits practical usage.
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05-25-2018, 11:29 PM
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#17
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by IRENE
Another consideration for those that leave their AIS powered up while secured to shore...
AIS transmits in available "time slots". There is a pecking order for those slots. By securing your unit unless you are underway or anchored, you are allowing those navigating to use the time slots for the intended safety purposes.
Thanks to those who secure their units.
Best Wishes
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That was my understanding as well. As the system gets overloaded, signals further out get dropped out. I think there is also a priority system for some class A systems. As they reach the limit of the number of targets they can track, they drop the class B signals. That doesn’t affect me as I don’t have a transponder, yet.
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05-26-2018, 05:22 AM
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#18
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TF Site Team
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
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I bet what you're seeing on the Marinetraffic app is not a true AIS but the pseudo-AIS one can activate using marinetraffic or boatbeacon apps on a phone or tablet and an MMSI. I use this on my boat but do not have a real AIS.
Occasionally, when I drive home from the marina, I forget to turn off the boat beacon on my tablet and it looks like FlyWright is cruising down the highway.
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05-26-2018, 05:39 AM
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#19
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,818
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Quote:
Originally Posted by IRENE
Another consideration for those that leave their AIS powered up while secured to shore...
AIS transmits in available "time slots". There is a pecking order for those slots. By securing your unit unless you are underway or anchored, you are allowing those navigating to use the time slots for the intended safety purposes.
Thanks to those who secure their units.
Best Wishes
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Quote:
Originally Posted by dhays
That was my understanding as well. As the system gets overloaded, signals further out get dropped out. I think there is also a priority system for some class A systems. As they reach the limit of the number of targets they can track, they drop the class B signals. That doesn’t affect me as I don’t have a transponder, yet.
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I don't think that's quite accurate. The busiest AIS port I've been is Norfolk, VA. The Navy leaves all their AIS units on when tied to the docks. There are maybe a hundred AIS units on within 5 miles and and several hundred units within my reception range as all the commercial ships, tugs, etc leave their units on whether tied to the dock or not. While I do have to turn my guard zone off, the accuracy of moving ships in the shipping channel doesn't seem to be effected.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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05-26-2018, 07:12 AM
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#20
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Guru
City: Annapolis
Vessel Name: Ranger
Vessel Model: 58' Sedan Bridge
Join Date: Aug 2013
Posts: 7,068
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Quote:
Originally Posted by dhays
I disagree that leaving them on doesn’t necessarily create a problem. Having active AIS signals from boats that are not currently in operation can clutter up the AIS display in busy harbors reducing its effectiveness at its intended purpose, to help with collision avoidance.
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I like AIS, and use it often to understand and sometimes communicate with commercial or other traffic...
But there are so many boats without it that it hasn't become our main collision avoidance tool around here.
FWIW, our installer piggy-backed ours on the MFD circuit in a way that leaves the AIS transmitter always on... unless I rummage around to trip the breaker on that circuit. Don't completely remember why they did that, IIRC something about anchoring... but the result is that ours is usually on, even when we're in the slip.
-Chris
__________________
Chesapeake Bay, USA
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