Navigational warnings on 2016-04-20

UTC day · today

issued: 31
cancelled: 19
in force at end: 404
of these still in force: 0

What this reporting period contains

31 messages have issue dates in this period, and 19 have cancellation dates in it. A cancellation can close a message issued earlier; subtracting these totals does not give a count of new incidents.

4 category groups tie for the largest recorded count, with 4 messages each.

HYDROLANT accounts for 13 of 31 recorded messages (42%), 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

Quakes	4
Nav aids	4
Exercises	4
Other	4
Piracy	3
Incidents	3
Surveys	2
Spills	1
Derelicts	1
Icebergs	1
Cable ops	1
Ordnance	1
Restricted	1
Missiles	1

Issued · by sea

North Pacific Ocean	5
South Pacific Ocean	4
South Atlantic Ocean	3
Gulf of Guinea	3
Gulf of Mexico	2
Celtic Sea	1
Mediterranean Sea - Eastern Basin	1
North Atlantic Ocean	1

HYDROLANT 13 · HYDROPAC 9 · USGS earthquakes 4 · NAVAREA IV 2 · HYDROARC 1 · NOAA IncidentNews 1 · NAVAREA XII 1

Issued · 31

Cancelled · 19

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