Greetings listmates, Following Rudy’s suggestion, I’m trying to get another discussion underway. I’m wondering how reliable and useful you are finding your AIS transceivers to be in the waters you frequent. My harbor (Camden, Maine) is chock-full of transmitters...many from boats at moorings or on the dock. I assume most are Class B devices. When I am on the bay, I find the occasional lag in data updates to significantly reduce my confidence in the plotted position of the targets. With the continued reduction in pricing and ease of installation, I’m guessing I’ll be seeing many more this season. What’s your experience? Craig in Camden Sent from my iPad

We installed an AIS transponder on Sanderling before we did the inland river portion of the Great Loop in 2013. It definitely was helpful on the sharp, horse-shoe bends of the inland rivers. Not as important as radar, IMHO, overall, but nonetheless helpful. If I had to choose between AIS transponder (no reason to go with just a receiver) and radar, radar would take the prize every time. I can't understand why the AIS would lag in updates. It's basically VHF line-of-sight if you have an installed transceiver, which could possibly be subject to electronic interference once-in-awhile. Now if you're using an app, like MarineTraffic.com, in order to view the signals that's an entirely different matter. The one thing that creates problems, again IMHO, in crowded areas like NYC harbor, and possibly Camden (definitely not a particularly crowded area), is the number of boat which leave their AIS broadcasting even when they are not underway (moored or in a marina), or even when they're hauled on the hard; a boat anchored out of a marked anchorage is justified in operating the AIS! This a misuse of the AIS that's basically a Facebook post to let your friends know where you are, which provides clutter that isn't helpful to anyone and makes the boats that you need to know about sometimes difficult to track. <><><><><><><><><><><><>Mozilla Thunderbird<><><><><><><><><><> Bob McLeran and Judy Young Manatee Cove Marina, Patrick AFB Florida Formerly cruising in MV Sanderling, a DeFever 41 Trawler which has been sold Blog: http://mvsanderling.net/Blog On 3/20/2021 07:24 AM, Craig Mudge via Trawlers-and-Trawlering wrote: > Greetings listmates, > > Following Rudy’s suggestion, I’m trying to get another discussion underway. > > I’m wondering how reliable and useful you are finding your AIS transceivers to be in the waters you frequent. > > My harbor (Camden, Maine) is chock-full of transmitters...many from boats at moorings or on the dock. I assume most are Class B devices. > > When I am on the bay, I find the occasional lag in data updates to significantly reduce my confidence in the plotted position of the targets. > > With the continued reduction in pricing and ease of installation, I’m guessing I’ll be seeing many more this season. > > What’s your experience? > > Craig in Camden > > Sent from my iPad > > To access the T&T List archives, go to https://lists.trawlering.com/empathy/list/trawlers.lists.trawlering.com > To unsubscribe, send email to trawlers-leave@lists.trawlering.com with nothing in the subject or body of the message. > > Trawlers & Trawlering and T&T are trademarks of Water World Productions. Unauthorized use is prohibited.

Bob said: *I can't understand why the AIS would lag in updates.* Bob, "Class *B AIS* signals transit its location every 30 seconds *or* so at 2 watts which means they have a lower strength and range." So, you get a 30-seconds lag. I'm sure you have noticed fast moving yachts literally jumping up your AIS display every half minute or so. IMHO, overlays of the chart, radar and AIS are UTOPIA!!!...if a bit confusing. Stay safe! Bob __________________________ Robert Calhoun Smith, Jr. M/V MARY KATHRYN (on the hard this winter) Hatteras 58 LRC Annapolis, Maryland Annapolis Yacht Club Hatteras LRC Club Marine Trawler Owners Assoc. #4861 On Sat, Mar 20, 2021 at 6:10 PM Bob McLeran <Bob@mvsanderling.net> wrote: > We installed an AIS transponder on Sanderling before we did the inland > river portion of the Great Loop in 2013. It definitely was helpful on > the sharp, horse-shoe bends of the inland rivers. Not as important as > radar, IMHO, overall, but nonetheless helpful. If I had to choose > between AIS transponder (no reason to go with just a receiver) and > radar, radar would take the prize every time. > > I can't understand why the AIS would lag in updates. It's basically VHF > line-of-sight if you have an installed transceiver, which could possibly > be subject to electronic interference once-in-awhile. Now if you're > using an app, like MarineTraffic.com, in order to view the signals > that's an entirely different matter. > > The one thing that creates problems, again IMHO, in crowded areas like > NYC harbor, and possibly Camden (definitely not a particularly crowded > area), is the number of boat which leave their AIS broadcasting even > when they are not underway (moored or in a marina), or even when they're > hauled on the hard; a boat anchored out of a marked anchorage is > justified in operating the AIS! This a misuse of the AIS that's > basically a Facebook post to let your friends know where you are, which > provides clutter that isn't helpful to anyone and makes the boats that > you need to know about sometimes difficult to track. > > <><><><><><><><><><><><>Mozilla Thunderbird<><><><><><><><><><> > Bob McLeran and Judy Young > Manatee Cove Marina, Patrick AFB Florida > Formerly cruising in MV Sanderling, a DeFever 41 Trawler > which has been sold > Blog: http://mvsanderling.net/Blog > > On 3/20/2021 07:24 AM, Craig Mudge via Trawlers-and-Trawlering wrote: > > Greetings listmates, > > > > Following Rudy’s suggestion, I’m trying to get another discussion > underway. > > > > I’m wondering how reliable and useful you are finding your AIS > transceivers to be in the waters you frequent. > > > > My harbor (Camden, Maine) is chock-full of transmitters...many from > boats at moorings or on the dock. I assume most are Class B devices. > > > > When I am on the bay, I find the occasional lag in data updates to > significantly reduce my confidence in the plotted position of the targets. > > > > With the continued reduction in pricing and ease of installation, I’m > guessing I’ll be seeing many more this season. > > > > What’s your experience? > > > > Craig in Camden > > > > Sent from my iPad > > > > To access the T&T List archives, go to > https://lists.trawlering.com/empathy/list/trawlers.lists.trawlering.com > > To unsubscribe, send email to trawlers-leave@lists.trawlering.com with > nothing in the subject or body of the message. > > > > Trawlers & Trawlering and T&T are trademarks of Water World Productions. > Unauthorized use is prohibited. > > To access the T&T List archives, go to > https://lists.trawlering.com/empathy/list/trawlers.lists.trawlering.com > To unsubscribe, send email to trawlers-leave@lists.trawlering.com with > nothing in the subject or body of the message. > > Trawlers & Trawlering and T&T are trademarks of Water World Productions. > Unauthorized use is prohibited.