Convert from fathom to yoctometer

Unit Definition (fathom)
a linear unit of measurement (equal to 6 feet) for water depth.

Unit Definition (yoctometer)
The yoctometre (or yoctometer), symbol: ym, is a decimal fraction of a metre, from the International System of Units. One yoctometre is 1x10-24 (1e-24) in scientific notation. Very small!