Protecting Blue Whales and Blue Skies (BWBS) is a partnership between public agencies, foundations, research partners and environmental NGOs working to make our skies cleaner, and the ocean quieter and safer for endangered whales. We accomplish this by: monitoring the speeds of vessels 300 GT (gross tons) and larger that pass through voluntary Vessel Speed Reduction ("VSR") zones each year where ships are encouraged to reduce speeds for whale safer transits; quantifying the environmental benefits of participation and providing recognition to high performing participating shipping companies; and working with ambassador companies reliant on ocean freight to demonstrate demand for responsible practices that protect marine biodiversity and air quality.