IFR Questions

heading indicator..
what causes this to be inaccurate?
im getting screamed at by atc to expedite my turn because this thing is not on the money. the only way i was able to correct it was to sorta cheat by using the flight map.
what causes them to cancel my IFR flight plan out of the blue? it had been two minutes or so since my last directive and they said it was cancelled.
another great thing about IFR happened the other day.. i was flying dutch harbor to akutan alaska, a short hop in a seaplane for fun. they vectored me right into a mountain. wee.
what causes this to be inaccurate?
im getting screamed at by atc to expedite my turn because this thing is not on the money. the only way i was able to correct it was to sorta cheat by using the flight map.
what causes them to cancel my IFR flight plan out of the blue? it had been two minutes or so since my last directive and they said it was cancelled.
another great thing about IFR happened the other day.. i was flying dutch harbor to akutan alaska, a short hop in a seaplane for fun. they vectored me right into a mountain. wee.