Whose Master chief billy Sunday in men of honor?

In the film "Men of Honor," Master Chief Billy Sunday, portrayed by Cuba Gooding Jr., is a determined and skilled Navy diver who faces significant challenges, including racial discrimination, as he strives to achieve his dream of becoming a Master Diver. He is mentored by Chief Petty Officer Carl Brashear, played by Robert De Niro, who initially doubts Sunday but ultimately recognizes his talent and resilience. The film is based on the true story of Carl Brashear, the first African American Master Diver in the U.S. Navy.