Anchoring footprint
Measurement answer
What this metric measures
Reports the total number of anchoring events across vessels in a cruise line fleet.
Specification
Metric specification
- Result format
- Single value
- Unit
- number of anchoring events — source-defined reporting unit
- Reporting basis
- reporting period
- Aggregation
- Sum of anchoring events across vessels in the cruise line fleet.
- Pillar
- Environmental
- Topic
- Ocean-use change
- Controlled domain
- Nature, biodiversity and land
- Entity type
- Metric
Reporting boundary
Anchoring events by vessels in the reporting cruise line fleet.
Verified source occurrences
Framework coverage
This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.
- Adopting DisclosureSource evidence
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- pp. 72-73, Section 3.3, Table 16
- Adopting DisclosureMT.A1.1
TNFD sector guidance
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Version 1.0, June 2025
- Requirement
- Recommended
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- pp. 72-73, Section 3.3, Table 16
Value structure
Dimensions and units
- Unit
- number of anchoring events — source-defined reporting unit
- Reporting basis
- reporting period
Unit meaning: Values use number of anchoring events under the disclosed TNFD sector-guidance method, reporting period and boundary.
Table fields and units
- vessel
- cruise line fleet
- number of anchoring events
Published dimensions
- vessel
- cruise line fleet
Calculation method
Formula information
- Status
- Specified
- Formula type
- Sum
Formula
A = Σ e_v, where e_v is the number of anchoring events recorded for vessel v during the reporting period.Apply the source-defined TNFD sector-guidance method within the stated reporting boundary. The source identifies a direct, independently reportable fleet-level count with a stated aggregation across vessels. It is distinct from spatial-footprint metrics because it counts anchoring events rather than area.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
A | Total anchoring events | Total number of anchoring events across the reporting cruise line fleet. | number of anchoring events |
e_v | Anchoring events for vessel v | Number of anchoring events recorded for an individual vessel during the reporting period. | number of anchoring events |
Verified sources
Evidence and status sources
Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.
Measurement evidence
- Measurement evidenceChecked 30 August 2026
TNFD additional sector guidance collection
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- Final English sector guidance collection through August 2026 (17 documents)
- Locator
- pp. 72-73, Section 3.3, Table 16
Supports: The official TNFD sector guidance supports the identity, boundary and method basis of “Anchoring footprint”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: TNFD sector guidance, Final English sector guidance collection through August 2026 (17 documents).
- Define an anchoring event, including treatment of repeated anchoring, repositioning, and emergency anchoring.
- Disclose the vessels and fleet entities included in the count.
- State the reporting-period coverage and any data gaps or estimated events.
Record-specific limitations
- A count of anchoring events does not measure the area, duration, location, seabed condition, or ecological severity of anchoring impacts.
- Comparability depends on consistent definitions of an anchoring event and fleet inclusion.
Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.
Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.