Insights
Technical notes and project cases
Technical articles on marine geoscience, offshore campaign management and data verification. Worked examples, not general theory.
The datum problem: ETRS89 and WGS84 are not the same coordinate
Two systems that look like the same answer, drifting apart by 2.5 cm a year since 1989. The difference is systematic, predictable and detectable with a subtraction – and still one of the most routine errors in survey deliverables.
Read →When the critical path moves
A critical path is not a property of the project. It is a property of the assumptions the schedule was built on – and offshore, the assumption doing the most work is the one about weather.
Read →Reading a crossline check as a map, not a pass rate
A crossline analysis compares the dataset against itself. Reduced to a percentage in the final report, it loses the very information that matters: where the two measurements disagree, and why.
Read →Introducing CLEGAR
Why CLEGAR exists, what independence means when assessing a geophysical dataset, and how the five service lines fit together.
Read →