Conversion in the opposite direction
The inverse of the conversion factor is that 1 foot per second is equal to 0.00149240252215591 times 397 knots.
It can also be expressed as: 397 knots is equal to feet per second.
An approximate numerical result would be: three hundred and ninety-seven knots is about six hundred and seventy point zero five feet per second, or alternatively, a foot per second is about zero times three hundred and ninety-seven knots.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.