Navigational warnings, week 2012-W17

2012-04-23 to 2012-04-29 UTC

issued: 136
cancelled: 160
in force at end: 272
of these still in force: 0

What this reporting period contains

136 messages have issue dates in this period, and 160 have cancellation dates in it. A cancellation can close a message issued earlier; subtracting these totals does not give a count of new incidents.

Exercises accounts for 26 of 136 recorded messages (19%), the largest category group in this selection.

HYDROPAC accounts for 66 of 136 recorded messages (49%), 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

Exercises	26
Other	20
Incidents	16
Nav aids	14
Quakes	14
Cable ops	11
Icebergs	8
Missiles	7
Surveys	6
Piracy	3
Derelicts	3
Wrecks	2
Spills	2
Towing	2
Restricted	1
Volcanic	1

Issued · by sea

North Atlantic Ocean	13
North Pacific Ocean	11
South Pacific Ocean	8
Arabian Sea	7
Labrador Sea	7
South China Sea	6
South Atlantic Ocean	5
North Sea	5

HYDROPAC 66 · HYDROLANT 41 · USGS earthquakes 14 · NAVAREA IV 11 · NAVAREA XII 2 · NOAA IncidentNews 2

Issued · 136

Cancelled · 160

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