This document lists deficiency codes used by the Tokyo MOU for deficiencies related to various certificates, structural conditions, water/weathertight conditions, emergency systems, radio communications, cargo operations, fire safety, alarms, working and living conditions, safety of navigation, life saving appliances, dangerous goods, propulsion and auxiliary machinery, and pollution prevention on board ships. It includes codes for deficiencies related to specific certificates, ship structures, emergency equipment, cargo handling, fire protection, alarms, crew living and working conditions, navigation equipment, life saving appliances, dangerous cargo carriage, machinery issues, and pollution prevention equipment required by MARPOL conventions. The codes are organized by category and provide detailed items that could be subject to deficiencies.