safair requirments are about 2500 hours and altp subjects for the hercs and about 3000 hours with altp subjects and preferably a similar type rating for the jets. looks like the hercs will stay for a bit longer. the 727's will be gone before the end of this year and there are rumours abound that they will get 737 200 or 300's. the question of who will crew them is still up for debate as far as i hear. it is possible they may outsource for crew. i also heard that comair may operate the 737's. as i said these are rumours so i may be wrong. it is just what i heard.
ps yes the hercs are great to fly but the 727's are better!