Sea Ledger, July 1998

1998-07-01 to 1998-07-31 · archive

issued
36
warning-days in force
2,243
in force at month end
73
sea × type cells
65

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

By type

typeissuedwarning-daysin force at end
Quakes2571.63
Spills81173
Other2325.611
Nav aids1830.227
Incidents01866
War risk01244
Surveys01244
Wrecks01244
Derelicts0622
Containers0311
Towing0311
Exercises0311
Structures0311
Ordnance0311
Cable ops0311
Restricted0311
Mines0311
Volcanic0311

By sea and type · 65 cells, most issued first

cellissuedwarning-daysvs 5 y
Quakes · South Pacific Ocean921.6
Quakes · Coral Sea515
Spills · North Atlantic Ocean461
Quakes · North Pacific Ocean39
Other · North Atlantic Oceanlong running277.6
Spills · Gulf of Mexico220
Quakes · Bismarck Sea26
Quakes · Philippine Sea26
Nav aids · Mediterranean Sea - Western Basin186.2
Spills · Gulf of Alaska114
Spills · The Coastal Waters of Southeast Alaska and British Columbia114
Quakes · Gulf of Alaska13
Quakes · Gulf of California13
Quakes · Indian Ocean13
Quakes · North Atlantic Ocean13
Nav aids · North Atlantic Oceanlong running0124
War risk · Persian Gulflong running0124
Nav aids · Tyrrhenian Sealong running093
Nav aids · North Pacific Oceanlong running062
Nav aids · North Sea062
Other · North Sealong running062
Nav aids · Persian Gulf062
Nav aids · South Atlantic Ocean062
Nav aids · Adriatic Sea031
Other · Adriatic Sealong running031
Surveys · Adriatic Sea031
Exercises · Aegean Sea031
Towing · Black Sealong running031
Nav aids · Bristol Channellong running031
Nav aids · Caribbean Sea031
Incidents · Caribbean Sealong running031
Containers · Celtic Sea031
Ordnance · English Channellong running031
Wrecks · English Channel031
Other · Gulf of Mexicolong running031
Nav aids · Gulf of Suez031
Derelicts · Indian Oceanlong running031
Nav aids · Indian Ocean031
Other · Labrador Sealong running031
Incidents · Ligurian Sealong running031
Wrecks · Malacca Straitlong running031
Nav aids · Mediterranean Sea - Eastern Basin031
Restricted · North Atlantic Ocean031
Incidents · North Atlantic Oceanlong running031
Surveys · North Atlantic Ocean031
Derelicts · North Pacific Oceanlong running031
Mines · North Sea031
Structures · North Sea031
Surveys · North Sea031
Wrecks · North Sea031
Cable ops · Persian Gulf031
Wrecks · Persian Gulflong running031
Nav aids · Philippine Sealong running031
Volcanic · Philippine Sealong running031
Other · Red Sealong running031
Other · South Atlantic Oceanlong running031
Incidents · South Atlantic Ocean031
Surveys · South Atlantic Ocean031
Incidents · South China Sealong running031
Nav aids · South Pacific Oceanlong running031
Incidents · South Pacific Ocean031
Nav aids · Timor Sealong running031
Other · Tyrrhenian Sea031
Spills · Caribbean Sea08
Quakes · Southern Ocean02

Cite: seahazards.com Sea Ledger, 1998-07, 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, July 1998 — warnings by sea and type · seahazards