Navigational warnings on 2011-04-21

UTC day · today

issued
34
cancelled
33
in force at end
303
of these still in force
0

What this reporting period contains

34 messages have issue dates in this period, and 33 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, Other tie for the largest recorded count, with 9 messages each.

HYDROPAC accounts for 20 of 34 recorded messages (59%), 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

Other9
Exercises9
Incidents4
Quakes4
Nav aids3
Piracy1
Surveys1
Missiles1
Derelicts1
Ordnance1

Issued · by sea

North Pacific Ocean7
Japan Sea2
Persian Gulf1
South Atlantic Ocean1
South China Sea1
North Sea1
Arabian Sea1
Yellow Sea1

HYDROPAC 20 · HYDROLANT 9 · USGS earthquakes 4 · HYDROARC 1

Issued · 34

Cancelled · 33

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

Navigational warnings on 2011-04-21 · seahazards