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[gpsd-dev] [RFC 1/3] [AIS] Add UK/ROI AtoN moni toring data message docu


From: chgans
Subject: [gpsd-dev] [RFC 1/3] [AIS] Add UK/ROI AtoN moni toring data message documentation
Date: Wed, 23 May 2012 01:03:01 +0100

From: Christian Gagneraud <address@hidden>

---
 www/AIVDM.txt |   63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 63 insertions(+), 0 deletions(-)

diff --git a/www/AIVDM.txt b/www/AIVDM.txt
index 2cc5136..6a108ee 100644
--- a/www/AIVDM.txt
+++ b/www/AIVDM.txt
@@ -874,6 +874,8 @@ in use for type 6.
 |   1 | 28 |     | <<IMO289>>  | Standard         | Route info addressed
 |   1 | 30 |     | <<IMO289>>  | Standard         | Text description addressed
 |   1 | 32 |     | <<IMO289>>  | Standard         | Tidal Window
+| 235 | 10 |     | <<IALA-A126>> | In use         | AIS AtoN monitoring data 
(UK)
+| 250 | 10 |     | <<IALA-A126>> | In use         | AIS AtoN monitoring data 
(ROI)
 |==============================================================================
 
 DAC/FID pairs are assigned separately per message type.
@@ -1703,6 +1705,62 @@ different bit widths for the latitude and longitude 
fields.
 The group of fields from longitude on may repeat twice more to convey up to
 three points of tidal information. 
 
+==== AtoN monitoring data (GLA) ====
+
+This message provides AtoN (Aid to navigation) monitoring data for the AtoN 
administration
+
+A message 6 subtype. DAC = 235 or 250 FID = 10. Fixed length: 136 bits.
+
+DAC and FI are user configurable, DAC=235/FI=10 is used in UK, DAC=250/FI=10
+in the Republic Of Ireland.
+
+The interval between the transmission of these messages will be synchronized
+with message 21, although not necessarily at the same reporting rate. If
+Message 21 is not used at a particular site, then the reporting interval
+should be selected to minimise the power requirement of the transponder,
+whilst still providing enough data to enable meaningful diagnostic analysis.
+
+[frame="topbot",options="header"]
+|==============================================================================
+|Field   |Len |Description       |Member     |T|Units
+|0-5     |  6 |Message Type      |type       |u|Constant: 6
+|6-7     |  2 |Repeat Indicator  |repeat     |u|As in Common Navigation Block
+|8-37    | 30 |Source MMSI       |mmsi       |u|9 decimal digits
+|38-39   |  2 |Sequence Number   |seqno      |u|Unsigned integer 0-3
+|40-69   | 30 |Destination MMSI  |dest_mmsi  |u|9 decimal digits
+|70-70   |  1 |Retransmit flag   |retransmit |u|0 = no retransmit (default),
+                                                1 = retransmitted
+|71-71   |  1 |Spare                 |          |x|Not used
+|72-81   | 10 |DAC                   |dac       |u|DAC = 235 or 250
+|82-87   |  6 |FID                   |fid       |u|FID = 10
+|88-97   | 10 |Analogue              |ana_int   |u|0.05– 36V 0.05V step 
+                                                   Supply voltage to AIS Unit
+                                                   0 – Not Used
+|98-107  | 10 |Analogue (external #1)|ana_ext1|u|0.05– 36V 0.05V step
+                                               0 – Not Used
+|108-117 | 10 |Analogue (external #2)|ana_ext2|u|0.05– 36V 0.05V step
+                                               0 – Not Used
+|118-122 |  5 |Status bits (internal)|stat_int|u|      / 00 = no RACON 
installed
+                                                 4  \ /  01 = RACON not 
monitored
+                                                 3  / \  10 = RACON operational
+                                                      \ 11 = RACON ERROR
+                                                       / 00 = no light or no 
monitoring
+                                                 2  \ /  01 = Light ON 
+                                                 1  / \  10 = Light OFF  
+                                                       \ 11 = Light ERROR
+                                                 0        0 = Good Health, 1 = 
Alarm
+|123-130 |  8 |Status bits (external)|stat_ext|u|7  Digital Input 0=Off, 1=On
+                                                 :
+                                                 :
+                                                 0  Digital Input 0=Off, 1=On
+|131-131 |  1 |Off position status   |off_position|b|0 = On position, 1 = Off 
position
+|132-135 |  4 |Spare                 |          |x|Not used
+|==============================================================================
+
+The internal status bits are the same as the 5 LSBs of status bits from
+Message type 21.
+
+
 === Type 7: Binary Acknowledge ===
 
 Message type 7 is a receipt acknowledgement to the senders of a
@@ -4384,6 +4442,11 @@ Identification System]
   289: Guidance on the Use of AIS Application-Specific Messages 
   (June 2010)]
 
+- [[IALA-A126]] 
+  http://www.ialathree.org/chapo/publications/documentspdf/doc_235_eng.pdf[IALA
+  Recommendation A-126 On The Use of the Automatic Identification System (AIS)
+  in Marine Aids to Navigation Services
+
 - [[[Schwehr]]] http://schwehr.org/blog/[Kurt Schwehr's weblog]
 
 - [[[IEC-PAS]]] IEC-PAS 61162-100, "Maritime navigation and
-- 
1.7.7




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