iceberg
Enable an AI agent to recognise and track an individual iceberg, assess its changing physical state and hazards, and determine which observations or interventions are justified.
Bundle → Layer → Finding → Questions Filled
5 bundles · 10 layers · 10 findings · 20 questions
Iceberg recognition and lineage Establishes what the ice body is and how its identity persists across observations and breakup.
Origin and classification
Records the evidence supporting land-ice origin, detachment and the chosen iceberg category.
Iceberg membership evidence
The agent must record a supported or provisional classification, including the convention used and evidence still missing.
- What evidence establishes that this is detached land-origin ice rather than sea ice or an attached ice front? definition
- Under which size convention does this body qualify as an iceberg, and could measurement uncertainty place it in a neighbouring fragment class? boundary
Sighting and fragment continuity
Connects observations and resulting fragments without assuming that a changing outline implies a new body.
Identity through change
The agent must distinguish supported track continuity from uncertain association and explicitly record breakup lineage.
- Which position history, shape features or other observations support associating this sighting with the existing iceberg? provenance
- After fragmentation, which body, if any, retains the previous identity, and which bodies require linked successor identities? boundary
Exposed and submerged form Describes the iceberg's visible form and underwater obstruction as separate, time-dependent evidence.
Exposed form
Records dimensions and distinctive features above the contemporaneous water surface.
Visible envelope
The agent must record observed exposed dimensions and outline without presenting an incomplete viewing angle as a complete survey.
- What length, width, freeboard and distinctive shape features were observed, at what time and relative to which water level? measurement
- Which faces or edges were obscured, and how does that limit the reported dimensions and shape classification? boundary
Underwater form
Records the submerged envelope and distinguishes direct observations from inferred geometry.
Draft and submerged projections
The agent must preserve the method and uncertainty of draft estimates and identify underwater areas that remain unresolved.
- What draft and lateral submerged extent are supported by observations, and what uncertainty accompanies each estimate? measurement
- Where geometry is inferred from exposed form, what assumptions were used and what independent evidence supports them? provenance
Drift, grounding and encounters Tracks movement and seabed contact and relates the iceberg's possible future position to nearby operations.
Motion and support
Separates measured drift and rotation from interpretations of floating or grounded state.
Observed motion and grounding
The agent must record motion over a stated interval and the evidence for any grounding assessment.
- What translation and rotation are supported by successive observations, including their time intervals and positional uncertainty? measurement
- What evidence distinguishes grounding from slow drift, and which water-level or seabed uncertainties could change that assessment? boundary
Future occupied water
Relates forecast movement and the iceberg's dimensions to potential encounters.
Encounter envelope
The agent must express future occupancy as a conditional estimate with an expiry and identify possible conflicts with linked vessels or structures.
- What area could the iceberg occupy over the decision horizon, given track uncertainty, submerged extent and the environmental forecast used? measurement
- Which possible encounters require a warning, route change or renewed observation under the applicable operating procedure? action
Deterioration and instability Records changes to the ice body and evidence relevant to fracture, shedding and rollover.
Ice loss and damage
Tracks observed loss of ice and changes to cracks, cavities and overhangs.
Documented deterioration
The agent must separate observed changes from inferred deterioration mechanisms and account for differing observation conditions.
- What changes in dimensions, cracks, cavities or fragment shedding are supported by comparable observations? measurement
- What evidence supports attributing the change to melting, fracture or another process rather than viewpoint or measurement differences? provenance
Rollover and breakup
Records evidence of instability and events that invalidate prior geometry or tracking assumptions.
Instability evidence and reassessment
The agent must record observed or suspected rollover and breakup while preserving uncertainty about future occurrence.
- What observations support a recent rollover, ongoing breakup or concern about instability, and what remains unresolved? measurement
- Which geometry estimates, track associations and nearby-operation decisions must be reassessed after the event? action
Observation and intervention Connects iceberg-specific evidence gaps and hazards to monitoring, approach and physical intervention decisions.
Observation sufficiency
Assesses whether available observations are adequate and recent enough for the proposed decision.
Decision-critical observation gaps
The agent must identify missing evidence about the iceberg and select observations that can resolve it within the operational time window.
- Which uncertainty about submerged extent, drift, grounding or structural condition currently limits the decision? measurement
- Which observation method and revisit interval can resolve that uncertainty while accounting for iceberg movement and possible shedding or rollover? action
Approach and physical intervention
Records the evidence, authority and stopping conditions for operations near or on the iceberg.
Intervention conditions
The agent must assess a specific proposed action against current iceberg evidence, linked operational capabilities and applicable authorization.
- For the proposed approach, sampling, tow or deflection, what evidence supports feasibility and what authorization or operating limits apply? action
- Which changes in drift, cracking, shedding, orientation or grounding require the action to stop and the assessment to be renewed? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
- Other names and narrower kinds
- growler, Tabular iceberg, blue iceberg
What it is Filled
This model owns an individual detached body of land-origin ice floating or grounded in water, including its observable geometry, movement, deterioration, continuity of identity and interaction with nearby operations; size thresholds and fragment classifications must follow an identified convention.
In scope
- Evidence that the body is detached land-origin ice and qualifies as an iceberg under the selected convention
- Above-water and submerged geometry, with observation times and uncertainty
- Position, drift, orientation and floating or grounded state
- Fracture, melting, rollover and fragmentation as changes to the tracked body
- Iceberg-specific hazards and conditions governing observation, avoidance or intervention
Out of scope
- The parent glacier or ice shelf as a continuing ice system
- Sea ice, ice floes and regional sea-ice cover
- Ocean currents, weather and bathymetry as independently maintained environmental models
- Vessels, offshore installations and their general operating procedures
- Regional iceberg populations, climatology and ice-service forecasting systems
- Ownership, permitting and commercial ice-harvesting operations beyond their constraints on this iceberg
Why it exists Filled
Enable an AI agent to recognise and track an individual iceberg, assess its changing physical state and hazards, and determine which observations or interventions are justified.
Distinguishing features Filled
- Establish land-ice origin using direct evidence or a qualified interpretation; a body formed by freezing surrounding seawater belongs to the sea-ice model.
- Establish detachment from a glacier or ice shelf; an attached projecting ice front is not yet an individual iceberg.
- Apply an explicitly named size convention to distinguish an iceberg from a bergy bit, growler or other fragment; preserve an uncertain classification when dimensions are unresolved.
- Distinguish one coherent ice body from a cluster of separate bodies or an unresolved radar return before assigning individual identity.
- Distinguish grounding from continued attachment to land ice; contact with the seabed does not by itself establish glacier membership.
What robots and AI may and may not do Filled
Must not
- Approach an iceberg closely with a vessel or people, risking capsizing or calving.
- Withhold or delay sighting reports that ships depend on.
- Mistake sea ice for an iceberg in reports.
- Tow or move an iceberg without authority and safety planning.
Only with a human decision
- Changing a vessel's route or operations near an iceberg.
- Towing or deflecting an iceberg near installations.
May
- Track an iceberg's position, size and drift from authorized observation sources.
- Report icebergs to ice services and nearby shipping.
Moral aspects Filled
- Icebergs endanger ships and lives, so timely reporting saves people.
- Icebergs are part of polar ecosystems and climate records.
Who is affected
- Mariners
- Offshore workers
- Polar wildlife
Owners Filled
Steward
Nobody: wild; ice services track them.
Master systems
- International ice patrol and national ice service records
Links to other meta-models Filled
parent
- Q12728448 - registry parent class
- Q15324 - registry parent class
- Q23392 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.iceberg
- Wikidata: Q47568 (https://www.wikidata.org/wiki/Q47568)
Direct properties required Filled
- Land-ice origin: confirmed land-origin ice | probable land-origin ice | unresolved
- Parent ice body: identified glacier or ice shelf, supporting evidence, or unknown
- Size and shape classification: class labels under a named convention and version, or unclassified
- Position and observation time: latitude and longitude in a stated reference system; timestamp; horizontal uncertainty in m
- Exposed dimensions: length, width and maximum freeboard in m relative to stated axes and water level
- Submerged extent: draft in m and underwater envelope; method, uncertainty and unresolved areas
- Drift and rotation: speed in m/s, direction in degrees and angular rate in degrees/hour; reference frame and interval
- Support state: floating | grounded | intermittently grounded | unresolved
- Structural condition: observed cracks, overhangs, cavities, fragment shedding and recent orientation changes; unknown where unobserved
- Track and fragment lineage: prior observations, predecessor body and resulting fragments, with association confidence
Recognition required Filled
- A large floating mass of white or blue-tinted ice rising above the water.
- Most of the mass is underwater, often with a broad hidden base.
- Smaller pieces include bergy bits and growlers.
Capabilities and actions required Filled
- Recognise or provisionally classify an ice body using origin, detachment and size evidence.
- Associate new sightings with the iceberg and maintain a track with explicit uncertainty.
- Request remote, surface or underwater observations to resolve decision-critical gaps.
- Estimate future occupied areas and possible encounters using linked environmental information.
- Recommend avoidance, monitoring or operational restrictions using current evidence and applicable procedures.
- Assess whether a proposed tow, deflection, sampling or other intervention has sufficient evidence and authorization to proceed.
Hazards and failure modes required Filled
- Collision with ships, often from hidden underwater parts.
- Calving and rolling that swamp nearby boats.
- Scouring of seabed pipelines and cables.
Standards and interfaces required Filled
- The International Convention for the Safety of Life at Sea maintained by the International Maritime Organization includes provisions for reporting dangerous ice and for the North Atlantic Ice Patrol.
- The Sea-Ice Nomenclature issued by the World Meteorological Organization provides official terminology for describing icebergs and related floating ice.
Context of use required Filled
- Icebergs occur where pieces of glaciers or ice shelves break away and float in the sea or other bodies of water.
- They are tracked for navigation safety and studied to understand ice loss, freshwater movement and polar environments.
Sources Filled
- Wikidata item Q47568: iceberg - identity and sense of the item
- Wikipedia: Iceberg - general description of the item
Open questions
- Which authoritative classification convention should govern iceberg, bergy-bit and growler boundaries, including treatment of freshwater settings?
- What minimum evidence should support land-ice origin when neither the calving event nor the parent glacier or ice shelf is known?
- Which methods can estimate submerged geometry adequately for each intended decision, and how should their uncertainty be represented?
- What identity-continuity rule should apply after substantial fragmentation, rollover or a prolonged tracking gap?
- Which validated criteria and jurisdiction-specific procedures should govern observation freshness, approach limits and physical intervention?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q47568/spec.json