Got a big question for you that someone just brought up here at my flight school I thought was a pretty damn good question.

Can I legally log SIC in an aircraft at SeaPort Airlines that is Single Pilot Certified? Can I apply it towards the ATP?

61.51 (f) allows logging SIC time only if:
the type certificate for the aircraft requires two pilots or
the regulations under which the flight is conducted require two pilots.

135.99 (b) No certificate holder may operate an aircraft without a SIC if that ac has a pax seating config excluding pilot seats of ten seats or more.

I do know that 135.101 states "Except as provided in 135.105, no person may operate an aircraft carrying passengers under IFR unless there is a SIC of the aircraft."

135.105- Basically states that you can still fly under IFR without a SIC if you have an Autopilot on board, and certain other circumstances.

So what does all of this mean? So an SIC is only required if the flight is under IFR without Autopilot, or there are ten or more pax (seaport c208 has 9 pax). So it would be safe to assume that you can't log SIC towards the ATP flying at SeaPort. UNLESS, SeaPort's OpSpec requires a SIC on ALL flights. But if thats the case, I thought SeaPort has the potential for the Captain to fly Solo if need be... Just some food for thought.

Thanks!