baseline plan

Only if there is some required deviation from the baseline plan will you actually return to Earth.

The scenario for your mission is quite complicated and the baseline plan has only recently been defined.

If I remember correctly, the baseline plan is for us to wait here in Mars orbit for six months, she replied.

NASA has now adopted commercial support as its baseline plan for the ISS.

A baseline plan and accompanying procedures for the rendezvous, worked out in great detail by the IIA in conjunction with ISA operations personnel, have already been transmitted to Commander Macmillan on the high-rate data stream.