This segment covers the period from 26 May to 28 July 2018. The magnetopause is accessible until late June and the neutral sheet from early July. There are manoeuvres on 28 May (C1, C2 and C3), 8 June (all spacecraft), and 19 July (C3 only).

18 April 2018 Loaded an initial set of attachments showing the planning of BM1 and BM2 through to end of PP931 (29 June). This is released ahead of completion of MSP 39.1 so as to encourage a smooth transition into this segment (as the preparation of commanding for PP927, the first planning period in MSP 39.1, is due to start on 26 April).