Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Confusion
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Clearance
Procedure; Human Factors; Chart Or Publication
We were assigned the obstacle departure Rwy 24 SBD. The departure reads 'Rwy 24 climbing left turn. All aircraft climb direct PDZ VOR.' After discussion we understood the departure to be a climbing left turn while climbing for terrain clearance then after the turn direct PDZ. After departure (while in a left turn) departure control queried us about our heading. We stated we were in a left turn per the obstacle departure. He said we had overshot the direct turn to PDZ it didn't require a full circle then direct. We were given a heading for PDZ and proceeded as directed. The rest of the departure was uneventful. There was no traffic conflict or terrain warnings. A note in the guide describing the procedure might make it more clear. From Rwy 24 it's really not a climbing left turn rather a left turn DIRECT to PDZ. It's not a complicated procedure however the high terrain near the airport led us to make more of the turn requirement than was needed.
Our clearance was to depart runway 24 via the Obstacle DP out of KSBD. We both looked over the Obstacle DP and agreed we were to make a climbing 360-degree left turn to PDZ. On TO; the controller informed us that we should have just made a slight left turn and gave us a right turn heading back towards PDZ. When I made the turn; I received a 'bank angle' which I immediately corrected. No other problems were encountered.
B757 flight crew reported a heading deviation due to confusion flying the SBD Obstacle Departure.