Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Flight Instructor; Flight Crew Commercial
Flight Crew Last 90 Days 20; Flight Crew Total 1638; Flight Crew Type 1548
Confusion; Communication Breakdown
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented
Chart Or Publication; Human Factors
I filed [an] IFR flight plan from ZZZ to DMW for a training flight with student and was PIC in VFR conditions. From east of BINNS Intersection; I was cleared for the RNAV (GPS) 16 approach direct BINNS.  I flew [the] approach starting the procedure turn and Controller informed me procedure turn not authorized.  I was in VMC conditions; cancelled IFR flight plan; and flew direct to DMW after partially completing the procedure turn.What confused me was on my approach plate; there is a note 1 stating: 'procedure not authorized for arrival at BINNS on V265 northbound.'  I was not on V265 northbound but had been cleared direct BINNS from the east.  I falsely concluded that the procedure turn was authorized given location and the published approach.I think what would have helped are 4 things. 1) The turn from BINNS to NISPL on the approach plate (eliminating the procedure turn) is about 120 degree turn.  Being greater than 90 degrees a procedure turn seems appropriate and again the note indicates no procedure turn if on V265 Northbound which I wasn't on.  If the approach plate; like others I've seen; had 'NoPT' showing note and sectors of the approach course; I would have readily understood 'NoPT' from my heading. 2) I should have asked for procedure turn given the potential confusion on the approach plate and will always do so going forward. 3) Like many other situations; controllers working sectors get accustomed to potential confusion in their sector and can help; when able; with pointing out these circumstances ahead helping pilots staying safe and in authorized areas. 4) I should have put 'practice approach' on notes section of flight plan which might have indicated to controller flight instruction and helped them help me in the approach.
Flight instructor reported a confusing note on the RNAV (GPS) RWY 16 approach at DMW that informed the decision to make a procedure turn; however ATC subsequently advised the procedure turn was not authorized.