Originally Posted by rabbo

Honestly, I don't know about studying for the ATP at Republic. Envoy's written for Rotor Transition Program was like an Army instrument evaluation not so much a ATP prep type test. The instructor pilot/check airman type dude [or in the case of Envoy RTP it was a written test] gives you a METAR and TAF from hell, flight plan/departure clearance, NOTAMs, radar images. Then you go through everything with questions like "Can you take off?" "What are the minimums required for this approach?" "Approach talks to you before the FAF and says weather is below minimums, can you continue?" "So your last clearance was "Hold at ABC VOR as published, EFC XXXX" and you lose comms, what do you do?"

Some other things we helicopter pilots probably don't know: holding speeds, airspeed limits and associated altitudes, oxygen requirements. If you're EMS and doing lots of NVG flying consider that runway lights aren't all green and you might want to know the colors and arrangements of approach lighting. Maybe holding entries if you are rusty on IFR.

If you want perspectives of helicopter pilots applying at regionals, you can check out Rotary to Airline Group. There isn't much in the Republic section but SkyWest has some detailed interview gouges and their interview seems rather in depth. https://rotarytoairlinegroup.org/forum/