Vessel underwater radiated noise at most used operational speed
Measurement answer
What this metric measures
Reports per-vessel underwater radiated noise as a Source Level or Radiated Noise Level spectrum at the vessel's most used operational speed.
Specification
Metric specification
- Result format
- Structured table
- Unit
- dB re 1 μPa·m — source-defined reporting unit
- Reporting basis
- Reporting period
- Aggregation
- Report a spectrum for each vessel measured at its most used operational speed
- Pillar
- Environmental
- Topic
- Pollution
- Controlled domain
- Pollution
- Entity type
- Metric
Reporting boundary
Vessels within the reporting organization's operational boundary that are measured at their most used operational speed
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
- p. 73, Section 3.3, Table 16
- Adopting DisclosureMT.A2.5
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
- p. 73, Section 3.3, Table 16
Value structure
Dimensions and units
- Unit
- dB re 1 μPa·m — source-defined reporting unit
- Reporting basis
- Reporting period
Unit meaning: Values use dB re 1 μPa·m under the disclosed TNFD sector-guidance method, reporting period and boundary.
Table fields and units
- vessel identifier
- most used operational speed
- measurement type
- frequency band or spectrum
- underwater radiated noise level
- unit
- ISO 17208 method applied
Published dimensions
- vessel
- noise measurement type: Source Level or Radiated Noise Level
- operational speed
- frequency spectrum
- measurement standard
Disclosure method
Formula information
- Status
- Not applicable
- Formula type
- Structured Disclosure
Disclosure form
No single formulaReport the source-defined result with its stated fields and method disclosures. This is a directly reportable additional-sector outcome metric with a specified per-vessel population, measurement condition, unit and referenced measurement standard. It is not equivalent to general light-and-noise management disclosures or to on-site ambient noise metrics.
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
- p. 73, Section 3.3, Table 16
Supports: The official TNFD sector guidance supports the identity, boundary and method basis of “Vessel underwater radiated noise at most used operational speed”.
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).
- Identify each measured vessel and its most used operational speed.
- State whether Source Level or Radiated Noise Level is reported.
- Report the noise spectrum and measurement approach in accordance with the applicable ISO 17208 standard(s).
Record-specific limitations
- The measurement represents underwater radiated noise at the vessel's most used operational speed and does not by itself characterize noise across all operating modes or speeds.
- The source permits either Source Level or Radiated Noise Level; the selected measurement type must be retained.
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.