Longest lifetimes in the archive · icebergs

Warnings whose cancellation we know as a fact, ranked by days from issue to cancellation (30 days or more).

• Mines
• Piracy
• Containers
• Missiles
• Derelicts
• Debris
• Volcanic
• Icebergs
• Wrecks
• Storms
• Quakes
• Spills
• War risk
• Ordnance
• Restricted
• Structures
• Exercises
• Cable ops
• Surveys
• Towing
• Nav aids
• Other

Nothing to rank.

Not for navigation. Only warnings we display are ranked; a closure inferred from a Wayback snapshot (the warning vanished between two captures) is not counted as a lifetime.