【单选题】The corrections are then communicated ________ to the navigators, where they are combined with the satellite signals received by the navigators, thereby improving their navigation or positioning.
【单选题】The corrections are then communicated _______ to the navigators, where they are combined with the satelliate signals received by the navigators, thereby improving their navigation or positioning.
【简答题】Corrections to Sailing Directions are given in Section IV. Those in force at the end of the year are reprinted in the Annual Summary of Notices to Mariners. A list of corrections in force is published...