Navigational warnings, week 2011-W50

2011-12-12 to 2011-12-18 UTC

issued: 140
cancelled: 155
in force at end: 251
of these still in force: 0

What this reporting period contains

140 messages have issue dates in this period, and 155 have cancellation dates in it. A cancellation can close a message issued earlier; subtracting these totals does not give a count of new incidents.

Other accounts for 34 of 140 recorded messages (24%), the largest category group in this selection.

HYDROPAC accounts for 71 of 140 recorded messages (51%), the largest source series group in this selection.

Separate updates to the same activity count as separate messages. The original records below show what was reported and when.

Issued · by type

Other	34
Cable ops	24
Incidents	23
Exercises	21
Nav aids	16
Quakes	7
Surveys	3
Missiles	3
Derelicts	2
Wrecks	2
Piracy	2
Icebergs	1
Containers	1
Spills	1

Issued · by sea

North Pacific Ocean	16
South Atlantic Ocean	10
North Atlantic Ocean	10
North Sea	9
Coral Sea	6
South Pacific Ocean	5
South China Sea	5
Indian Ocean	5

HYDROPAC 71 · HYDROLANT 57 · USGS earthquakes 7 · NAVAREA XII 3 · NAVAREA IV 1 · NOAA IncidentNews 1

Issued · 140

Cancelled · 155

Not for navigation. Counts include only warnings we display; ongoing search-and-rescue traffic is excluded until 30 days after it closes.