"Snowballs" - speaking for one operator/type, ie, ANZ and the B767, ex CHC at /close to MGTOW (CHC-SIN eg) you could turn onto a westerly heading at 500 ft off either runway at CHC and meet the climb requirements to MSA/LSALT - no special procedures are promulgated - typically however by the time ATC identifies you, you at 2000ft or so, and take DCT to the gateway from there. Terrain clearance is a PinC/crew responsibility, and condidering weight/performance/terrain and engine failure consideration before MSA/LSALT a crew will decide the most suitable technique on the day.