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PE

Philip Eslinger

Sat, Jun 2, 2007 5:10 PM

While The Coast Guard and the Navy do not broadcast AIS, they can
read it. We have a couple of CG officers who own a sailboat in the
slip next to ours and the subject of AIS came up a few weeks ago. He
told me that they just got the ability to read AIS. I would think
the Navy has also gotten that ability.

Crossing the Pacific to Hawaii, we got into some weird VHF skip
phenomena. 1000 miles away from California, we were still receiving
Coast Guard Los Angeles on the radio. It also picked up some AIS
contacts back in Long Beach over 1000 miles away.

Phil Eslinger
Flat Earth N5025
Ko Olina, Hi

While The Coast Guard and the Navy do not broadcast AIS, they can read it. We have a couple of CG officers who own a sailboat in the slip next to ours and the subject of AIS came up a few weeks ago. He told me that they just got the ability to read AIS. I would think the Navy has also gotten that ability. Crossing the Pacific to Hawaii, we got into some weird VHF skip phenomena. 1000 miles away from California, we were still receiving Coast Guard Los Angeles on the radio. It also picked up some AIS contacts back in Long Beach over 1000 miles away. Phil Eslinger Flat Earth N5025 Ko Olina, Hi

JF

John Ford

Sat, Jun 2, 2007 9:36 PM

Actually I have seen a large coast guard ship in the chesapeake bay
that was transmitting AIS, it was one of the ones that work on the
buoys. At first it caught me completely off guard but it makes sense
that they need to be seen when working near the shipping channels.

On Jun 2, 2007, at 1:10 PM, Philip Eslinger wrote:

While The Coast Guard and the Navy do not broadcast AIS, they can
read it. We have a couple of CG officers who own a sailboat in the
slip next to ours and the subject of AIS came up a few weeks ago. He
told me that they just got the ability to read AIS. I would think
the Navy has also gotten that ability.

Crossing the Pacific to Hawaii, we got into some weird VHF skip
phenomena. 1000 miles away from California, we were still receiving
Coast Guard Los Angeles on the radio. It also picked up some AIS
contacts back in Long Beach over 1000 miles away.

Phil Eslinger
Flat Earth N5025
Ko Olina, Hi

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Actually I have seen a large coast guard ship in the chesapeake bay that was transmitting AIS, it was one of the ones that work on the buoys. At first it caught me completely off guard but it makes sense that they need to be seen when working near the shipping channels. On Jun 2, 2007, at 1:10 PM, Philip Eslinger wrote: > While The Coast Guard and the Navy do not broadcast AIS, they can > read it. We have a couple of CG officers who own a sailboat in the > slip next to ours and the subject of AIS came up a few weeks ago. He > told me that they just got the ability to read AIS. I would think > the Navy has also gotten that ability. > > Crossing the Pacific to Hawaii, we got into some weird VHF skip > phenomena. 1000 miles away from California, we were still receiving > Coast Guard Los Angeles on the radio. It also picked up some AIS > contacts back in Long Beach over 1000 miles away. > > Phil Eslinger > Flat Earth N5025 > Ko Olina, Hi > _______________________________________________ > http://lists.samurai.com/mailman/listinfo/passagemaking-under-power > > To unsubscribe send email to > passagemaking-under-power-request@lists.samurai.com with the word > UNSUBSCRIBE and nothing else in the subject or body of the message. > > Passagemaking Under Power and PUP are trademarks of Water World > Productions, formerly known as Trawler World Productions.

RR

Ron Rogers

Sat, Jun 2, 2007 11:02 PM

On some site, I was looking at AIS signals in Seattle. USCG ships which
appeared to be alongside their docks were transmitting on their AIS systems.
I think that this is a tactical decision. Where safety concerns outweigh
security concerns the AIS is on. On rare occasions like the Navy celebration
in New York Harbor just past, I could see their turning on their AIS while
entering and departing, but off at rest and once free of the harbor. No need
to broadcast their positions and tactical dispositions. VHF signals can be
picked up by ground-based stations and satellites.

Ron Rogers

----- Original Message -----
From: "John Ford" johnpford@mac.com

| Actually I have seen a large coast guard ship in the chesapeake bay
| that was transmitting AIS, it was one of the ones that work on the
| buoys. At first it caught me completely off guard but it makes sense
| that they need to be seen when working near the shipping channels.

On some site, I was looking at AIS signals in Seattle. USCG ships which appeared to be alongside their docks were transmitting on their AIS systems. I think that this is a tactical decision. Where safety concerns outweigh security concerns the AIS is on. On rare occasions like the Navy celebration in New York Harbor just past, I could see their turning on their AIS while entering and departing, but off at rest and once free of the harbor. No need to broadcast their positions and tactical dispositions. VHF signals can be picked up by ground-based stations and satellites. Ron Rogers ----- Original Message ----- From: "John Ford" <johnpford@mac.com> | Actually I have seen a large coast guard ship in the chesapeake bay | that was transmitting AIS, it was one of the ones that work on the | buoys. At first it caught me completely off guard but it makes sense | that they need to be seen when working near the shipping channels.

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