Responsible Seamanship

On longer coastal and offshore passages, environmental awareness becomes even more important. Your vessel is self-contained for extended periods and every decision — from where you anchor to how you manage waste — has a cumulative impact on the marine environment. Responsible seamanship means actively minimising your footprint throughout the voyage.

When anchoring, always check charts and local notices for sensitive habitats such as seagrass beds, maerl, and biogenic reefs. Voluntary Marine Conservation Areas (VMCAs) may not carry legal restrictions but indicate ecologically important sites where best practice is to use a mooring or anchor well clear. Avoid using the anchor wash over seagrass — the powerful jet of water scours the seabed and can destroy fragile root systems even if the anchor itself missed them.

Wildlife encounters at sea are a privilege. If you encounter whales, basking sharks, or other large marine animals, reduce speed, avoid sudden course changes, and never approach head-on. Switch off echo sounders and fish finders if safe to do so, as the acoustic pulses can cause distress. Reducing engine noise by slowing down also lessens underwater sound pollution, which interferes with cetacean communication and navigation.

The Green Blue initiative is a joint programme by British Marine and the RYA that promotes environmentally responsible boating. It provides practical guidance on anti-fouling, sewage, cleaning products, waste, and wildlife — all freely available at thegreenblue.org.uk. Following Green Blue recommendations is considered best practice for all UK recreational sailors.

Sewage discharge regulations require that no untreated sewage is discharged within 3 nautical miles of land in UK waters. Holding tanks should be used within this zone and pumped out at shore facilities. Beyond 3nm, discharge is tolerated only if the vessel does not have a holding tank, but best practice is always to use pump-out facilities. Cleaning products used aboard should be phosphate-free and biodegradable — conventional household detergents and bleach can be toxic to marine organisms even in small quantities.