Performance monitoring

Performance monitoring is the routine analysis of a ship’s technical and operational performance against a baseline, principally speed and fuel consumption, hull and propeller fouling, and main engine efficiency. Data comes from noon reports and increasingly from continuous high-frequency sensors and torque meters, filtered for weather, current, draft, and trim before comparison to sea-trial or model curves. It feeds hull-cleaning and propeller-polishing decisions, charter-party speed and consumption warranties, and the SEEMP and Carbon Intensity Indicator under MARPOL Annex VI. Degradation of a few percent in propulsive efficiency translates directly into added fuel cost and CO2.