If you are at 644ft agl that equates to exactly 2 miles which is 3704 metres. How would you expect to see the lights if you need say 1200metres? Simple answer is you wont. I have no idea why such ridiculous mins are set on NPAs that sucker crews in that dont have the benefit of your command course. In fact what many TRI/Es do wrongly, is to set the vis higher than required as they think the sim is wrong! That in turn produces crews that dont appreciate that pans ops mins are cr@p.