This document introduces a new damage modifier of -25% for ships laid down before 1895. It is NOT used in addition to the modifier for ships laid down before 1925. The modifier for wooden ships is increased from -25% to -35%. These changes are included in the Annex Z extract on page 9.

1. Purpose. This instruction establishes the methodology for conducting the three components of Combat Assessment (CA) that may result in a re-attack recommendation (RR): battle damage assessment (BDA), collateral damage assessment (CDA), and munitions effectiveness assessment (MEA). It provides analysts with the definitions, methodology, and principles of reporting required for CA. It bridges the gap between doctrinal guidance provided in Joint Publications (JPs) and Combatant Commands’ (CCMDs’) CA programs.