5-6 LH Trips a month. Factually correct but the annual limits stand unchanged. So yes they may be able to roster 5-6 trips in a month for a while but sooner or later in the year you are going to hit the 900 hour buffer. Sooner in this case! 90 hours a month leaves you with November and December off by my reckoning, not much number crunching involved. So no, these rosters are not sustainable even as it stands.