9-4 
9 
9.1  Fault Finding
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Table 9-5: List of Navigation Message and Warnings   
 
Message  Class Description  ALR No. 
i
Anchorage Area  Alarm Crossing anchorage area.  245 
Anchorage Prohibited  Alarm Crossing anchorage prohibited.  246 
Approaching Obstruction  Alarm Approaching obstruction.  218 
Archipelagic Sea Lane  Alarm Approaching sea line.  256 
Approaching Water Rock  Alarm Approaching water rock.  219 
Approaching Wreck  Alarm Approaching wreck.  220 
Arrived at Last WPT  Alarm Arrived at last WPT.  210 
Arrived at WPT  Alarm Arrived at WPT.  207 
Cable Area  Alarm Crossing cable area.  244 
Cargo Transshipment Area  Alarm Crossing cargo transshipment area.  250 
Caution Area  Alarm Crossing caution area.  234 
Channel  Alarm Crossing channel.  240 
Crossing Safety Contour  Alarm Crossing safety contour.  217 
Dangerous Area  Alarm Crossing dangerous area.  254 
Dangerous Line  Alarm Crossing dangerous line.  253 
Dangerous Symbol  Alarm Crossing dangerous symbol.  222 
Deep Water Route  Alarm Crossing deep water route.  229 
Dragging Anchor  Alarm Dragging anchor.  223 
Dredge Area  Alarm Crossing dredge area.  249 
Dumping Ground  Alarm Crossing dumping ground.  248 
Fairway  Alarm Crossing fairway.  232 
Fishing Ground  Alarm Crossing fishing ground.  241 
Fishing Prohibited  Alarm Crossing fishing prohibited.  242 
Ice Area  Alarm Crossing ice area.  239 
Incineration Area  Alarm Crossing incineration area.  251 
Inshore Traffic Zone  Alarm Crossing inshore traffic zone.  231 
LAT Limit Over  Alarm
Own ship position reached latitude limit. 
The display limit latitude of the chart: 
 78°00.000’ N,  78°00.000’ S 
901 
Marine farm / aquaculture  Alarm Approaching marine farm / aquaculture.  257 
Military Practice Area  Alarm Crossing military practice area.  236 
Off Course  Alarm
The difference between the course and bearing 
exceed the limit. 
208 
Offshore Production Area  Alarm Crossing offshore production area.  235 
Pipeline Area  Alarm Crossing pipeline area.  243 
Recommended Traffic Line  Alarm Crossing recommended traffic area.  230 
Seaplane Landing Area  Alarm Crossing seaplane landing area.  237 
Sensitive Sea Area  Alarm Crossing sensitive sea area.  255 
Specially Protected Area  Alarm Crossing specially protected area.  252 
Spoil Ground  Alarm Crossing spoil ground.  247 
Submarine Transit Area  Alarm Crossing submarine transit area.  238 
Traffic Crossing  Alarm Crossing traffic crossing.  225 
Traffic Precautionary  Alarm Crossing traffic precautionary.  227 
Traffic Roundabout  Alarm Crossing traffic roundabout.  226 
Traffic Separation Zone  Alarm Crossing traffic separation zone.  224 
Two Way Traffic  Alarm Crossing two way traffic.  228 
XTD  Alarm
The amount of the cross track error exceeds the 
limit. 
209 
 
i. ALR No.: Unique alarm number in ALR sentence and ACK sentence