Minimum root safety factor

Symbol SFmin
Unit -
Attribute-ID abs2011 minimum safety factor root
Numeric ID 5354
Value Type PMDouble

The following options are available acc. to ABS 2011:

System type SFmin
Main drive 1.8
Dual main drive 1.6
Yacht main drive 1.5
Yacht dual main drive 1.45
Auxiliary drives 1.4

Source: American Bureau of Shipping (ABS): Rules for Building and Classing Steel Vessels, Paramus, New Jersey - 2011 edition