The U.S. Navy has announced that beginning Oct. 1, 2017, reporting seniors of active component limited duty officers (LDO) and chief warrant officers (CWO) will use specific officer summary groups (OSGs) in their fitness reports. This change applies for fitness report purposes only. LDOs and CWOs will retain their current designators. Reporting seniors should continue to adhere to upper limits on 'early promote' and 'must promote recommendations. Also, existing special billet subcategories will remain in effect. For more information, contact the Navy Personnel Command Customer Service Center at 1-866-U-ASK-NPC, or via e-mail at uasknpc@navy.mil.