Why might using biodegradable or phosphate-free cleaning products on board be recommended, beyond general good practice?

A. Biodegradable products have no functional difference from any other cleaning product

B. Grey water (sink and shower waste) from a boat is often discharged directly into the water without treatment — conventional detergents and phosphates entering the water this way can contribute to algal blooms and are more persistent and harmful to aquatic life than biodegradable, phosphate-free alternatives

C. This recommendation applies only to superyachts, never to small leisure craft

D. Grey water is always treated before discharge, so cleaning product choice makes no difference

A. Plastic may be discharged more than 12nm from land

B. Discharge of all plastics into the sea is prohibited everywhere, with no distance-from-land exception — plastic waste must always be retained on board and disposed of ashore

C. Plastic may be discharged if it is cut into small enough pieces first

D. The rule only applies to vessels over 400 gross tonnes

A. Fill as fast as possible to minimise time at the pump

B. Slow down as the tank approaches full, listen/watch for the tone or sight change indicating it's nearly done, and use a drip tray or absorbent pad under the filler and any vent to catch spillage or overflow

C. There is no real risk of spillage from a vent pipe, only from the filler itself

D. Environmental precautions are only necessary when refuelling from a jerry can, not at a fixed fuel berth