Navigational warnings, week 2017-W16

2017-04-17 to 2017-04-23 UTC

  1. 04-17
    30
  2. 04-18
    36
  3. 04-19
    28
  4. 04-20
    27
  5. 04-21
    36
  6. 04-22
    20
  7. 04-23
    19
issued
196
cancelled
250
in force at end
378
of these still in force
0

What this reporting period contains

196 messages have issue dates in this period, and 250 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 42 messages each.

HYDROPAC accounts for 89 of 196 recorded messages (45%), 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

Exercises42
Other42
Incidents30
Surveys16
Icebergs14
Nav aids13
Piracy8
Quakes7
Missiles6
Derelicts6
Wrecks4
Spills2
Cable ops2
Volcanic2
Debris1
Ordnance1

Issued · by sea

North Atlantic Ocean21
North Pacific Ocean18
South China Sea11
Southern Ocean8
South Pacific Ocean6
Arabian Sea5
Philippine Sea5
North Sea5

HYDROPAC 89 · HYDROLANT 74 · NAVAREA IV 15 · USGS earthquakes 7 · NAVAREA XII 6 · HYDROARC 3 · NOAA IncidentNews 2

Issued · 196

Cancelled · 250

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

Navigational warnings, week 2017-W16 (2017-04-17 to 2017-04-23) · seahazards