Date Changes April 01-07, 2018 DSCA Policy Memo 18-15 Establish Nonrecurring Cost (NC) Charges – Ship, Frigate, Multi-Mission Surface Combatant (MMSC) and COMBATSS-21 has been posted. This memo updates Appendix 1 - USML VI – Vessels of War and Special Naval Equipment and Appendix 1 - USML XII – Fire Control, Range Finder, Optical and Guidance and Control Equipment.