Navigational warnings, week 2012-W16

2012-04-16 to 2012-04-22 UTC

issued: 148
cancelled: 144
in force at end: 296
of these still in force: 0

What this reporting period contains

148 messages have issue dates in this period, and 144 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 31 of 148 recorded messages (21%), the largest category group in this selection.

HYDROPAC accounts for 77 of 148 recorded messages (52%), 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	31
Other	26
Incidents	22
Quakes	14
Nav aids	11
Cable ops	11
Icebergs	8
Surveys	7
Derelicts	6
Missiles	5
Piracy	3
Wrecks	2
Spills	1
Debris	1

Issued · by sea

South Atlantic Ocean	12
Indian Ocean	9
Arabian Sea	8
South Pacific Ocean	8
North Pacific Ocean	8
Labrador Sea	7
North Atlantic Ocean	6
South China Sea	4

HYDROPAC 77 · HYDROLANT 38 · USGS earthquakes 14 · NAVAREA IV 12 · HYDROARC 3 · NAVAREA XII 3 · NOAA IncidentNews 1

Issued · 148

Cancelled · 144

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