skills in an at-sea training environment. Such skills shall include skills that satisfy Navy personnel qualification standards associated with each of the following: (1) Shiphandling. (2) Navigation. (3) Radar operation. (4) Bridge resource management. (5) Seamanship. (6) Maintenance. (c) Qualification requirement for Surface Warfare Officers candidates Commencing not later than September 30, 2020, each Surface Warfare Officer candidate shall qualify as an Underway Officer of the Deck on a Navy Yard Patrol craft before completion of the Surface Warfare Officer School Basic Division Officer Course. 115. Manning of Forward Deployed Naval Forces (a) In general Commencing not later than October 1, 2019, the Secretary of the Navy shall maintain manning fit and manning fill for ships assigned to the Forward Deployed Naval Forces at levels not less than the levels established for each ship class or type of unit deploying from the United States. (b) Definitions In this section: (1) Manning fit The term manning fit , in the case of a ship, means the skills (rating), specialty skills (Navy Enlisted Classifications), and experience (paygrade) for the ship when compared with the billets authorized for such skills and experience. For purposes of the term, a sailor in a more senior paygrade may fill the billet of a more junior paygrade, but a sailor in a more junior paygrade may not fill the billet of a more senior paygrade. (2) Manning fill The term manning fill , in the case of a ship, means the total number of military personnel assigned to the ship by rating when compared with the billets authorized for the ship by rating. 116. Limitation on transition to Ready Relevant Learning training approaches The Secretary of the Navy may not transition any enlisted training to Ready Relevant Learning block learning, modernized delivery, or other similar approaches unless the first certification submitted to Congress pursuant to section 545 of the National Defense Authorization Act for Fiscal Year 2018 ( Public Law 115–91 ) after