Xmas AIS issues

[Simi 60]

Back upstairs because that vessel is on the move.
Now showing up on AIS again

Do you perhaps have software settings to suppress anchored or moored targets being displayed?

Not that I am aware of.
If you look at the list in the first post there are several moored vessels there

Do you have a different antenna you can connect, even a little rubber ducky (while you wait for the new antenna)?

Nope.
Just have to sit and wait for the US inefficiencies sort themselves out.
Ordered Antenna from US and AIS from China on same day.
China gets here a few days ago with 3 checkpoint on tracking.
US is still on its way doing a tour of every stop and a million hands.......

23 Dec 2019
4:35am PST
Shipped from the Global Shipping Center to International Destination
Erlanger, Kentucky
20 Dec 2019
10:35am PST
Customs Documentation and Labeling
Erlanger, Kentucky
19 Dec 2019
9:45am PST
Delay at the Global Shipping Center - DANGEROUS_GOODS_REVIEW
Erlanger, Kentucky
19 Dec 2019
9:41am PST
Processing at the Global Shipping Center
Erlanger, Kentucky
17 Dec 2019
10:48am PST
In Transit - In transit - In transit to local Post Office - Allow two to three additional days for delivery
CINCINNATI, OH 45235
16 Dec 2019
12:38pm PST
In Transit - In transit - In transit to U.S. Postal Service
CINCINNATI, OH 45234
16 Dec 2019
3:11am PST
In Transit - Departed FedEx location
FEDEX SMARTPOST GROVE CITY, OH 43123
13 Dec 2019
2:02pm PST
In Transit - Arrived at FedEx location
FEDEX SMARTPOST GROVE CITY, OH 43123
11 Dec 2019
3:51am PST
In Transit - Departed FedEx location
GROVE CITY, OH 43123
10 Dec 2019
5:08pm PST
In Transit - Arrived at FedEx location
GROVE CITY, OH 43123
10 Dec 2019
6:09am PST
In Transit - Departed FedEx location
EDISON, NJ 08817
10 Dec 2019
2:12am PST
In Transit - Arrived at FedEx location
EDISON, NJ 08817
9 Dec 2019
11:36pm PST
In Transit - Left FedEx origin facility
TRENTON, NJ 08691
9 Dec 2019
5:47pm PST
In Transit - Arrived at FedEx location
TRENTON, NJ 08691
10 Dec 2019
7:13am

[Paul L]

Also class B transmit dynamic data at as long as a 3 minute wait if not moving. The static data is every 6 mins. Not all data packets are received by design. So miss a few packets from an anchored boat and you may have to wait 10 or 12 mins for it to show up.

[Simi 60]

I guess its all working fine
This is all visible vessels.
The one at the top is about 16nm away.

[Reefmagnet]

I'd go with transmission or (distant second) GPS antenna issue. Sounds like you're only picking up the strongest signals at the point of reception. See if ProAIS2 works for your unit - it's readily downloadable via the Internet -which is used on many models to set the MMSI (You have set the MMSI, right?). It's got enough diagnostic functions to pinpoint most issues.

[Pete7]

Originally Posted by Simi 60

I guess its all working fine
This is all visible vessels.
The one at the top is about 16nm away.

That'll do

Pete

[JPA Cate]

Hi, Simi 60,

The guy who disappeared after anchoring may simply turn off his AIS transmission at anchor. Maybe uses a phone app for anchor alarm instead of his AIS.

Ann

[thereefgeek]

Originally Posted by Simi 60

Ordered AIS from China......

Maybe this???

[Simi 60]

Originally Posted by thereefgeek

Maybe this???

Really

[continuouswave]

Originally Posted by Dsanduril

Also, don’t necessarily believe the 40 mile report from the AtoN. Many AtoN do not broadcast themselves, instead the information is broadcast from a base station.

In the USA, most AIS AtoN signals are sent from N-AIS base stations. These stations are co-located with RESCUE21 installations. Transmitted signals from these stations are easily received at ranges of 25-miles or more. The AIS AtoN signals may be transmitted from more than one base station.

Reception of an AIS AtoN signal indicates only that your receiver is hearing the nearest RESCUE21 N-AIS co-located tower. I routinely receive AIS AtoN data for locations more than 80-miles away using an indoor antenna 20-miles inland. The direct path to those AIS AtoN locations would be more than 80-miles of all-terrain, an impossibly long distance for direct reception.

More about co-location of N-AIS and RESCUE21 installations at

http://continuouswave.com/whaler/ref...1Stations.html

[Discovery 15797]

Originally Posted by Simi 60

I still haven't figured out why a vessel a couple of hundred metres away, happily pinging away on marine traffic every few minutes is not showing up.
The whole concept of AIS (Apart from govt tracking our movements) is to see boats that are close so as to avoid collision right?

I agree with Ann (JPA Cate) on this; that vessel may have turned off the AIS.

If I am at dock, I turn off my AIS. I'm not moving and if another boat collides with me it's certainly not because I didn't have AIS turned on.

(IMHO AIS is great for coastal and offshore cruisers. But, for inland waters, and weekend boaters it is mostly noise.)

[mglonnro]

Originally Posted by Simi 60

I still haven't figured out why a vessel a couple of hundred metres away, happily pinging away on marine traffic every few minutes is not showing up.

Sounds interesting.

It's possible to update MT without sending out real AIS VHF pings, though. What boat was it?