theearl is right, sound advice, but since the question has been asked,
Could someone define a 'seeded' blindline?
I'll try.
The monthly bidpack, (document containing a list of all the available lines of work ) should contain all the lines of work available to be bid for: Triplines, Blindlines and Reserve Lines.
At
Initial Bid publication Blindlines on most fleets (e.g 777) are completely empty....you can bid for a Blindline but you have no idea how Scheduling are going to fill the line later in the work allocation process, no idea of days off etc.
However on a Fleet with "Seeded Blindline's" (only the 744 Fleet) each Blindline will contain one trip (which should be a "long range" trip) at publication. That means that looking at any seeded Blindline you know for definite some of it's working days and probably more importantly some of the days off ( i.e. before/after the seeded trip), and can bid as appropriate.
Hope that makes sense and helps....