Cryptologic Linguist Operator/Analyst (NMOS) (2641)
1 October 2018 was the scheduled active-duty-component Marine Corps Total Force System (MCTFS) batch date, not a universal individual qualification or retraining date.
- The table marks revisions to the MOS description, entry or terminal grade/category, and requirements. The detailed revised requirements are not shown here.
- The grade-range change did not direct promotion or demotion of individual Marines.
- Reserve retraining for PSMRP, Active Reserve and Selected Marine Corps Reserve groups was to be coordinated as required for conversion, subject to available funds.
- Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists required appropriate service record book entries using the headquarters conversion action as authority.
- Formal schools were to continue awarding current MOSs until a MARADMIN directed implementation of the new conversions.
Source extraction notes
Source new title: Advanced Cryptologic Language Analyst (NMOS)(2641, 2629, 2691). Figure 4-1 remarks: 2, 4, 7. Paragraph 4001.1b schedules the active duty component MCTFS batch for 1 October 2018. Paragraph 4001.6 separately covers Reserve retraining, subject to available funds for the specified retraining groups, and record updates for Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists. Under paragraph 4002.3, formal schools keep awarding current MOSs until a MARADMIN directs implementation. The batch date is not a documented universal individual qualification or retraining date. The conversion table changes the classification's grade range from Pvt-Sgt to Pvt-MGySgt. These ranges are not a direction to promote or demote individual Marines.
Source documents (1)
Reviewed September 24, 2026 against references 1, 3, 4 and 5.
- NAVMC 1200.1D, FY19 Military Occupational Specialty Manual, Figure 4-1
1. Figure 4-1, printed p. 4-8, PDF p. 800, PRESENT MOS 2642 · source dated 2018 · cited by the explanation
PDF page 800 (opens in a new tab)2.NAVMC 1200.1D, FY19 Military Occupational Specialty Manual, Figure 4-1 · event transcription · docs/legacy-data/usmc-mos-conversions.jsonl:159; Figure 4-1, printed p. 4-8, PDF p. 800, PRESENT MOS 2642
PDF page 800 (opens in a new tab)3.NAVMC 1200.1D: FY19 enlisted conversion table legend · Figure 4-1 note, printed p. 4-14 / PDF p. 806 · cited by the explanation
PDF page 806 (opens in a new tab)4.NAVMC 1200.1D: FY19 implementation conditions · Paragraphs 4001.1b, 4001.6 and 4002, printed pages 4-1 and 4-2 / PDF pages 793 and 794 · cited by the explanation
PDF page 793 (opens in a new tab)PDF page 794 (opens in a new tab)5.NAVMC 1200.1D: 2642 present and new grade ranges · Figure 4-1, MOS 2642; cached conversion-chapter text lines 442-446 · cited by the explanation
PDF page 800 (opens in a new tab)