according to Jabbers, on downwind, at 5 miles zoom on HSI, your left aircraft symbol wingtip should touch the course line running through the TACAN channel at BRC course, with you, flying downwind. The 45 turn begins when you start to see the full RUNDOWN (that is the aft part of the landing deck sloping down towards the stern of the ship, marked by a white surface). If you can see the slope, on the rundown, you simultaneously add power and a 30 degree bank to the 90 degree position and a -300/400 fpm sink rate. once past the ships wake, you quickly glance to check your alignment to the runway, point the nose to the crotch, then increase sink rate to -400/500 fpm. It happens automatically with practice.