The secondary research process involved comprehensive analysis of maritime regulatory databases, shipping industry publications, commodity trade reports, and authoritative maritime organizations. Key sources included the International Maritime Organization (IMO), U.S. Maritime Administration (MARAD), European Maritime Safety Agency (EMSA), United Nations Conference on Trade and Development (UNCTAD), Baltic Exchange, International Chamber of Shipping (ICS), BIMCO (Baltic and International Maritime Council), Intercargo, Lloyd's List Intelligence, Clarksons Research Services, Drewry Maritime Research, UN Comtrade Database, World Steel Association, International Energy Agency (IEA), U.S. Energy Information Administration (EIA), National Bureau of Statistics of China (for commodity import data), and port authority statistics from major global hubs (Singapore, Rotterdam, Qingdao, Newcastle). These sources were utilized to collect vessel fleet data, freight rate indices (BDI/BCI), commodity trade flows, regulatory compliance timelines, port throughput statistics, and scrapping/newbuild delivery schedules for Capesize, Panamax, Supramax, and Handysize vessels.