refPlus20,
You got it right.
# Runway heading means Runway heading.
# "Climb straight ahead" means Runway heading, because the heading will be straight ahead, while the airplane is drifting.
# "Maintain runway track". Well a track must have a starting point such as a VOR, NDB, etc... in this case what is the starting point ?
# "Runway QDM". Well in many countries they dont even use this term.
# "Back course localizer". Now we are complicating a simple issue here, by over loading the pilot at a critical phase of flight with unnecessary extra task.
IN THE END JUST MAINITAIN RUNWAY HEADING.