Navigational warnings, week 2017-W27

2017-07-03 to 2017-07-09 UTC

issued: 179
cancelled: 162
in force at end: 452
of these still in force: 0

What this reporting period contains

179 messages have issue dates in this period, and 162 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 48 of 179 recorded messages (27%), the largest category group in this selection.

HYDROLANT accounts for 78 of 179 recorded messages (44%), 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	48
Other	38
Exercises	27
Nav aids	16
Surveys	15
Icebergs	8
Wrecks	7
Spills	5
Quakes	5
Debris	3
Missiles	3
Restricted	1
Ordnance	1
Piracy	1
Derelicts	1

Issued · by sea

South Pacific Ocean	12
North Sea	11
North Atlantic Ocean	9
Mediterranean Sea - Eastern Basin	9
South Atlantic Ocean	8
North Pacific Ocean	7
Labrador Sea	7
Gulf of Mexico	6

HYDROLANT 78 · HYDROPAC 68 · NAVAREA IV 12 · HYDROARC 9 · USGS earthquakes 5 · NOAA IncidentNews 5 · NAVAREA XII 2

Issued · 179

Cancelled · 162

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