Module 17 - Marine Environment
Protecting Marine Wildlife
What you will learn
Operate predictably around marine wildlife and treat a protected-area designation as a prompt to check the site's current measures rather than assume one blanket rule.
Space, predictable movement and local information reduce disturbance. The skipper must separate the general encounter routine from the legal or voluntary controls that apply at a named place.
The current Marine and Coastal Wildlife Code applies to England. It advises motorised craft to stay at least 100 metres from marine wildlife, remain below 6 knots at no-wake speed, move farther away when disturbance is seen and keep clear when more than two craft are already nearby. Scotland, Wales and Northern Ireland publish their own guidance, and a local authority or protected site can add a different or stricter measure.
If dolphins, whales or porpoises choose to approach, maintain a steady speed and direction and let them end the encounter. Do not chase, crowd, encircle, feed or intercept wildlife for a better view. Head-on or close astern approaches reduce the animal's room to choose. Sudden course or speed changes can also increase collision or propeller risk.
An MCZ or SAC identifies protected features and a management framework; it does not itself tell the skipper that every activity is banned or allowed. MMO byelaws can control anchoring, vessel speed, entry, seabed disturbance, particular activities, zones or seasons at named sites. Check the current measure, chart, local notice and signs for the actual place.
Separate the encounter from the site rule
A pod of dolphins approaches while the yacht is motoring near a protected headland. Two wildlife boats are already close to the group.
1. Stabilise
Keep a steady, predictable direction and safe speed rather than turning towards the animals.
2. Create space
Do not join the cluster. Increase separation and let the animals choose whether to remain near the yacht.
3. Observe
Watch for repeated avoidance, direction changes, rapid departure or other disturbance cues and move farther away.
4. Verify
Apply the current site-specific speed, access or seasonal measure as well as the general encounter routine.
Sense check: A good encounter can end immediately without the skipper needing a better photograph or a longer view.
Common mistake or limitation
- The 100-metre and below-6-knot wording is England guidance, not one automatic legal rule for every UK or overseas encounter.
- Stopping the engine abruptly is not always the safest response when animals are close; predictable movement and the vessel-specific situation matter.
- MCZ and SAC are not synonyms for one universal anchoring ban. Find the protected feature and the current site measure.
Recap
- In England, the published motorised-craft baseline is at least 100 metres, below 6 knots at no-wake speed and farther away if disturbance appears.
- An animal approaching the yacht is not permission to chase, turn into or prolong the encounter.
- Protected-area decisions require the current site-specific measure, not a conclusion drawn from the designation alone.
Optional quick check
Section 5 of 8
What should an MCZ or SAC label make a skipper do before entering?
Sources and factual review
Reviewed 20 August 2026 - Compass Revision editorial review.
Continue studying Marine Environment
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