Noon report
The daily vessel report: its contents, its role as the evidential basis of a performance claim, and the known weaknesses that high-frequency monitoring addresses.
A noon report is the daily position and performance report transmitted from a ship to its operator, conventionally at 1200 ship’s time, recording distance run, speed over ground and through water, observed weather and sea state, fuel consumed by grade, remaining bunkers, shaft revolutions and slip.
It is the primary evidential record in a charter party speed and consumption dispute, and its weaknesses are therefore contested rather than academic. The data is coarse, being one observation per day averaged over the preceding period; the weather entry is a master’s observation rather than an instrument reading, and whether a period was Beaufort force 4 or force 5 can decide whether it is admissible in a good weather analysis at all; and speed through water depends on a log whose calibration is rarely verified at sea.
A second weakness matters to performance analysis rather than to claims: speed and weather are cross-correlated in noon data, because a master slows in heavy weather, which biases any regression that treats them as independent. High-frequency shaft power and flow-meter telemetry addresses both problems by sampling continuously. The full article will cover report content, transmission and verification, and the interaction with ISO 19030 trending. See slow steaming and off-hire and performance claims .