On NAV Bull search you can see what breeding values corresponds to in practice. Just click the “Show phenotypic values” button below the pedigree on bull’s own page to see the effect on the daughters of a particular bull in the scale that the trait is measured in.
An overview of phenotypic values per index unit for each breed and trait can be found from in the user manual for NAV Bull Search. Here is a shortcut to the breed wise overviews: HOL, RDC, JER