ISO 23731:2021 PDF

Name: ISO 23731:2021 — Marine technology — Marine environment impact assessment (MEIA) — Performance specification for in situ image-based surveys in deep seafloor environments
SKU: ISO 23731:2021
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Marine technology — Marine environment impact assessment (MEIA) — Performance specification for in situ image-based surveys in deep seafloor environments

Название (английский):

ISO 23731:2021

Marine technology — Marine environment impact assessment (MEIA) — Performance specification for in situ image-based surveys in deep seafloor environments

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 27 июля 2021 г.
Издание:: ISO IS 23731 edition 1 version 1
ICS:: 13.020.30

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Описание (английский):

This document specifies minimum requirements and provides recommendations for the gathering of image-based data at seafloor where epifauna and benthopelagic fauna with a minimum dimension of 1 cm are used as a proxy for the status of the biological community.

Abstract

Похожие стандарты

Другие стандарты ISO

Overview

ISO 23731:2021 - Marine technology - Marine environment impact assessment (MEIA) - Performance specification for in situ image-based surveys in deep seafloor environments provides minimum requirements and recommendations for acquiring image-based data on the deep seafloor. The standard focuses on non‑destructive, long‑term monitoring where epifauna and benthopelagic fauna ≥ 1 cm are used as proxies for biological community status. It is intended to support MEIA, seabed mining monitoring, scientific research and seafloor observatory deployments.

Key topics and technical requirements

Imaging principle: Fixed‑point, in situ image-based surveys (video or high‑frame stills) to capture organism behavior, activity and particle motion without disturbing habitats.

Organism size: Target fauna with a minimum dimension of 1 cm as proxies for community assessment.

Frame rate & duration: Capture as video or stills ≥ 15 fps, with each imaging event ≥ 5 s.

Sampling schedule: Imaging events at 6–8 hour intervals or less to permit diel and temporal analyses; long‑term series (e.g., up to a year or more) recommended for seasonal cycles.

Platform types: Supports both stationary platforms (moorings, landers, observatories) and moving platforms (AUVs, ROVs, HOVs). Repeated observations should re‑image ≥ 50% of prior area/volume.

Angle, scale & altitude: Camera angle relative to seafloor and altitude must be known/recorded; scale recoverable via stereo calibration, laser scaling or known reference objects.

Illumination: Use white light with recorded intensity/wavelength; red light permitted as supplementary illumination.

Baiting: Standardize bait size so flesh is consumed within 7 days; bait placement in field of view to assess scavenger/predator presence.

Environmental sensors: Co‑deploy CTD or equivalent to correlate images with temperature, salinity, currents and other physicochemical data.

Data and metadata: Synchronize all instruments to a single clock (frame‑level or ≤1 s drift). Archive in viewable, preferably non‑proprietary formats; recommended container and metadata practices (example filename: PLATFORM-YYYYMMDD-HHMMSS-CAMERA1-01.mov). Higher‑bit codecs (e.g., Apple ProRes ≥10‑bit, 422 LT or better) are recommended for post‑processing.

Applications and users

Marine researchers conducting deep‑sea biodiversity, behavior and ecological variability studies

Environmental impact assessors and consultants for offshore developments and seabed mining

Regulators and permitting authorities requiring standardized monitoring protocols for MEIA

Observatory and vehicle operators (AUV/ROV/HOV/landers) designing long‑term imaging programs

Data managers and analysts implementing synchronized metadata, archiving and QA/QC workflows

Related standards

ISBA/25/LTC/6 - guidance for environmental assessment in marine mineral exploration (referenced normative guidance)

ISO/TC 8 (Ships and marine technology), Subcommittee SC 13 (Marine technology) - committee responsible for this work

Keywords: ISO 23731:2021, marine environment impact assessment, MEIA, in situ image-based surveys, deep seafloor, seafloor observatory, AUV, ROV, video monitoring, seabed mining monitoring.

ISO 23731:2021 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

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