Navigational warnings on 2012-04-20

UTC day · today

issued
22
cancelled
25
in force at end
308
of these still in force
0

What this reporting period contains

22 messages have issue dates in this period, and 25 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, Incidents tie for the largest recorded count, with 4 messages each.

HYDROLANT accounts for 9 of 22 recorded messages (41%), 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

Exercises4
Incidents4
Cable ops3
Quakes3
Icebergs2
Derelicts1
Other1
Wrecks1
Nav aids1
Surveys1
Missiles1

Issued · by sea

Indian Ocean3
North Pacific Ocean2
North Atlantic Ocean2
Black Sea1
South Atlantic Ocean1
Mozambique Channel1
Celtic Sea1
Southern Ocean1

HYDROLANT 9 · HYDROPAC 8 · USGS earthquakes 3 · HYDROARC 1 · NAVAREA IV 1

Issued · 22

Cancelled · 25

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 2012-04-20 · seahazards