It's not the Captain who decides "Safe Speed", it's the prevailing
circumstances and conditions that decide it.
It is the Captains responsibility to factor in all conditions regarding
his boat, it's equipment, the weather, other traffic, and then use good
sense and good seamanship to adjust his speed according to those
prevailing circumstances and conditions ..... which means you've got a
problem ..... you ain't got no sense and I doubt you know what
seamanship is.

otn