Overview
EN ISO 21416:2019 (ISO 21416:2019) - Recreational diving services - specifies requirements and provides guidance on environmentally sustainable practices in recreational diving. Published by ISO and adopted by CEN as EN ISO 21416:2019, the standard covers responsible conduct for service providers and offers best-practice guidance to minimize negative impacts on the aquatic environment. It applies to activities including scuba diving, snorkelling and free (breath‑hold) diving and helps stakeholders identify and compare providers who follow environmental best practice.
Key Topics and Requirements
The standard combines prescriptive requirements with practical guidance across core operational areas:
- Conduct of diving activities
- Mandatory environmental briefings and local pre‑dive advice
- Gear streamlining and pre‑dive safety checks
- Site selection matched to diver competency; avoid sensitive sites for training
- Encouragement of good buoyancy control and use of descent/ascent lines
- Operation of dive boats
- Avoid anchoring on sensitive seabeds; prefer mooring buoys
- Minimise propeller and engine impact; maintain engines to reduce pollution
- Proper bilge, sewage and waste management; provide waste receptacles
- Prohibit harassment of marine life (e.g., chasing cetaceans)
- Interaction with aquatic life
- Discourage removal or collection of organisms; explain ecological impacts
- Prohibit or discourage feeding - outlines negative behavioural and ecological effects
- Exception only for regulated scientific removal (e.g., invasive species) where legally authorised
- Conservation and pollution control
- Consider site carrying capacity to avoid over‑use
- Responsible selection of anti‑fouling paints and disposal of oils/chemicals
- Shore-based facilities, underwater heritage and protected areas
- Guidance on facility operation, heritage-site conservation and working within marine protected areas
- Supporting materials
- Informative Annex A with further guidance and a bibliography
Practical Applications - Who Uses It
EN ISO 21416:2019 is intended for:
- Dive centres, schools, clubs and instructors
- Dive-boat operators and marina/shore facility managers
- Diver training organisations and tour operators
- Government agencies, marine park managers and environmental NGOs
Use cases include drafting environmental policies, standardising pre‑dive briefings, designing waste and sewage procedures, selecting mooring solutions, and auditing service providers for sustainable practice.
Related Standards
- ISO 24803 and ISO 13289 are referenced as complementary standards for dive service operations and provider requirements.
- Developed by ISO/TC 228 (Tourism and related services) and endorsed by CEN as EN ISO 21416:2019.
Keywords: EN ISO 21416:2019, ISO 21416:2019, recreational diving services, sustainable diving, dive operators, marine conservation, scuba diving, snorkelling, free diving.