Sea Ledger, December 1998

1998-12-01 to 1998-12-31 · archive

issued
85
warning-days in force
4,251
in force at month end
171
sea × type cells
115

baseline: same month, previous 5 years — not available for this month (needs three fully collected reference months)

By type

typeissuedwarning-daysin force at end
Quakes21100.42
Nav aids181,607.864
Spills111676
Cable ops9198.212
Incidents5348.915
Containers5153.67
Other3547.820
Surveys3148.37
Wrecks3304.811
Derelicts2198.27
Missiles238.33
Icebergs20.82
Exercises133.72
War risk01244
Ordnance0622
Towing0311
Structures0622
Debris0311
Restricted0311
Mines0311
Volcanic0311

By sea and type · 115 cells, most issued first

cellissuedwarning-daysvs 5 y
Quakes · South Pacific Ocean721.2
Spills · Gulf of Mexico667
Quakes · Molukka Sea412
Nav aids · North Sealong running386.8
Containers · North Atlantic Ocean359.7
Nav aids · South Atlantic Ocean2229.5
Nav aids · Inner Seas off the West Coast of Scotland231.3
Spills · Caribbean Sea228
Spills · Gulf of Alaska228
Cable ops · Celtic Sea215.8
Missiles · North Pacific Ocean27.3
Quakes · North Atlantic Ocean26
Quakes · Philippine Sea26
Cable ops · North Atlantic Ocean21
Icebergs · North Atlantic Ocean20.8
Nav aids · Tyrrhenian Sealong running1185.2
Nav aids · North Atlantic Oceanlong running1155.2
Wrecks · North Sea1122.1
Incidents · South China Sealong running1109.6
Nav aids · North Pacific Oceanlong running177.6
Nav aids · Persian Gulf176.4
Wrecks · Persian Gulflong running170.2
Incidents · North Atlantic Oceanlong running166
Nav aids · English Channel165.8
Nav aids · Indian Ocean158.1
Nav aids · Adriatic Sealong running153.5
Surveys · South Atlantic Ocean150.4
Containers · South China Sea149.5
Nav aids · Coral Sea135.9
Nav aids · Celtic Sea135.7
Quakes · North Pacific Ocean134
Cable ops · South China Sea133.2
Cable ops · Eastern China Sea130.9
Derelicts · Coral Sea126.1
Cable ops · South Atlantic Ocean120.7
Wrecks · South China Sea119.5
Nav aids · Ligurian Sea118.1
Derelicts · Mediterranean Sea - Eastern Basin117.1
Other · Bass Strait116.9
Containers · South Atlantic Ocean113.4
Spills · North Atlantic Ocean113
Incidents · Celebes Sea110.7
Incidents · Red Sea16.6
Surveys · Japan Sea13.6
Other · Caribbean Sea13.3
Quakes · Caribbean Sea13
Quakes · Coral Sea13
Quakes · Flores Sea13
Quakes · Indian Ocean13
Quakes · South Atlantic Ocean13
Nav aids · Arafura Sea12.7
Exercises · North Atlantic Ocean12.7
Cable ops · Aegean Sea12.2
Cable ops · Ionian Sea11.4
Surveys · Mediterranean Sea - Western Basin11.3
Incidents · North Pacific Ocean11
Other · Ionian Sea10.6
War risk · Persian Gulflong running0124
Nav aids · Mediterranean Sea - Western Basin093
Other · North Atlantic Oceanlong running093
Other · North Sealong running093
Cable ops · Persian Gulf062
Other · South Atlantic Oceanlong running062
Nav aids · South Pacific Oceanlong running062
Other · Tyrrhenian Sea062
Other · Adriatic Sealong running031
Surveys · Adriatic Sealong running031
Exercises · Aegean Sea031
Nav aids · Black Sea031
Towing · Black Sealong running031
Nav aids · Bristol Channellong running031
Nav aids · Caribbean Sea031
Incidents · Caribbean Sealong running031
Containers · Celtic Sealong running031
Ordnance · English Channellong running031
Wrecks · English Channel031
Other · Gulf of Mexicolong running031
Nav aids · Gulf of Suez031
Derelicts · Indian Oceanlong running031
Other · Labrador Sealong running031
Incidents · Laccadive Sea031
Incidents · Ligurian Sealong running031
Other · Makassar Strait031
Wrecks · Malacca Straitlong running031
Nav aids · Mediterranean Sea - Eastern Basinlong running031
Derelicts · Mediterranean Sea - Western Basin031
Cable ops · Mozambique Channel031
Nav aids · Mozambique Channel031
Debris · North Atlantic Ocean031
Missiles · North Atlantic Ocean031
Ordnance · North Atlantic Ocean031
Restricted · North Atlantic Ocean031
Surveys · North Atlantic Oceanlong running031
Derelicts · North Pacific Oceanlong running031
Mines · North Sea031
Structures · North Sea031
Surveys · North Sealong running031
Other · Persian Gulf031
Structures · Persian Gulf031
Nav aids · Philippine Sealong running031
Volcanic · Philippine Sealong running031
Other · Red Sealong running031
Nav aids · Rio de La Plata031
Nav aids · Solomon Sea031
Derelicts · South Atlantic Ocean031
Incidents · South Atlantic Oceanlong running031
Other · South China Sea031
Derelicts · South Pacific Ocean031
Incidents · South Pacific Ocean031
Nav aids · Sulu Sea031
Nav aids · Timor Sealong running031
Spills · Tyrrhenian Sea031
Wrecks · Tyrrhenian Sea031
Quakes · Banda Sea03.3
Quakes · Solomon Sea02.9

Cite: seahazards.com Sea Ledger, 1998-12, retrieved 2026-09-03

Not for navigation. Warning-days = days each warning was in force within the month, summed. Only warnings we display are counted; the ratio compares warnings issued with the mean of the reference months.

Sea Ledger, December 1998 — warnings by sea and type · seahazards