Segmentation by type classifies market activity into preventive maintenance, corrective repair, and conversion & upgrading, each with identifiable sub‑categories that affect total spend. Preventive maintenance—covering scheduled hull inspections, propulsion system servicing, and onboard equipment calibration—captures roughly 40 % of market value by reducing unplanned downtime. Corrective repair focuses on fault remediation, including structural welding, engine overhauls, and emergency system replacements, and contributes about 35 % as vessels age and encounter wear. Conversion & upgrading encompasses retrofits for emission reduction, digitalization of navigation suites, and compliance‑driven modifications (e.g., ballast‑water treatment), representing the remaining 25 % and reflecting the industry’s shift toward sustainability and efficiency. Within these types, sub‑types such as hull plating renewal, propulsion‑system re‑engineering, and regulatory‑compliance upgrades are quantified by their labor‑intensive nature and material costs, collectively defining the market taxonomy and its financial distribution.