Starting a few months ago, I’ve started seeing doubled-up messages coming through the Sat-C terminal one after another. If there’s a tropical storm warning, I’ll get it (and its blaring alarm) twice, etc. Looking at the logs, the two messages will have identical text but the message sizes will be slightly different. Has anybody else been experiencing this, or experienced it in the past?
Used to happen reguarly moving from AOR-E to AOR-W due to encoding errors by different “SafetyNet” authority - USCG took a while to get up to speed.
The message encoding includes an identifier that your receiver recognises. If the message is successfully received once (i.e. acceptable error-rate), your receiver will ignore subsequent re-broadcasts of the same message. If the message identity is not there, your receiver will keep spitting it out.
Message size difference might imply either (a) earlier message was incomplete for transmitted identity code, or (b) earlier message was incomplete for corrupted data/error-rate too high at the receiver.
On your terminal status screen, check BBER (bulletin board error rate) S/N etc.
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It’s a conspiracy by BIG PAPER.
IF THEY KEEP US PRINTING YOUR GOING TO HAVE KEEP MAKING THOSE REQUISITIONS FOR MORE TELEX PAPER!!
FOLLOW THE $$$
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… and the bloody ink ribbon cartridges too!!!
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This may be at the core of my issue. After confirming that my BBER is consistently satisfactory, I hit up JRC Tech Support. Per their response, “It sounds like you are receiving two broadcasts of the same information. The JUE-87 [the system installed on my ship] does not have a filtering function for reception of duplicate messages. The JUE-87 is operating normally.” So, if the NWS sends multiple copies of the same alert, I’ll just get all of them printing and screeching at me.
One officer even wrote up a Near Miss following the 29 July earthquake near Kamchatka, which precipitated about 30 hours of nonstop alarms as message after message in duplicate and triplicate barraged the receiver, dozens per watch when we’re supposed to be, you know, driving the ship.
Ugh.
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