When can seawater be used for laundry on a ship?

When can seawater be used for laundry on a ship?

• A. When the ship is outside 50 Fathom Curves
• B. When inside harbor
• C. After desalination
• D. Never

Answer: (A)

Sea water may be used for laundry when the ship is beyond the 50-fathom curve, meaning in offshore waters where there is enough dilution to minimize environmental impact from washwater and detergents. Inside harbor or nearshore areas within that depth boundary, stricter regulations and greater potential to affect coastal ecosystems typically require using freshwater or limit wastewater discharge. Desalination isn’t about using seawater for laundry—desalinated water is freshwater—so that option doesn’t apply to when you’d use seawater. Therefore, the offshore location beyond the 50-fathom curve is the appropriate condition.

Sea water may be used for laundry when the ship is beyond the 50-fathom curve, meaning in offshore waters where there is enough dilution to minimize environmental impact from washwater and detergents. Inside harbor or nearshore areas within that depth boundary, stricter regulations and greater potential to affect coastal ecosystems typically require using freshwater or limit wastewater discharge. Desalination isn’t about using seawater for laundry—desalinated water is freshwater—so that option doesn’t apply to when you’d use seawater. Therefore, the offshore location beyond the 50-fathom curve is the appropriate condition.