Navigational warnings, week 2016-W21

2016-05-23 to 2016-05-29 UTC

issued: 204
cancelled: 200
in force at end: 409
of these still in force: 0

What this reporting period contains

204 messages have issue dates in this period, and 200 have cancellation dates in it. A cancellation can close a message issued earlier; subtracting these totals does not give a count of new incidents.

Incidents accounts for 41 of 204 recorded messages (20%), the largest category group in this selection.

HYDROLANT accounts for 80 of 204 recorded messages (39%), 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

Incidents	41
Exercises	39
Other	33
Nav aids	17
Icebergs	17
Surveys	15
Missiles	15
Cable ops	9
Spills	6
Quakes	5
Debris	5
Restricted	1
Derelicts	1

Issued · by sea

North Atlantic Ocean	26
North Pacific Ocean	17
Mediterranean Sea - Eastern Basin	16
South Atlantic Ocean	11
Arabian Sea	7
South Pacific Ocean	7
Coral Sea	6
Black Sea	5

HYDROLANT 80 · HYDROPAC 77 · NAVAREA IV 21 · NAVAREA XII 8 · HYDROARC 7 · NOAA IncidentNews 6 · USGS earthquakes 5

Issued · 204

Cancelled · 200

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