Steven P. McNicoll wrote:

Every vector must be for someTHING, not necessarily someWHERE. When
initiating a vector the controller must advise the pilot of the purpose.
The vector may me for traffic or for spacing.

correct. if they say "vectors for traffic" and you lose comm,
squawk 7600 and then fly direct to your next fix as that is
your clearance. if they
say "fly heading 060" (but not for traffic), it is to
intercept an approach course or victor/jet airway
but it is for something. If they are just handing out vectors
to nowhere just to vector you around the Class B, well
do as they say in thee book. Do as cleared (but with no
further explanation) - expected (they didn't say anything) -
filed. Fly to the next fix even if it is behind you and then
continue on as filed. If they ask you then they can also listen
to the tapes and they should 'expect' a better clearance from
their controllers.

Gerald