S-44 and the systematic error

S-44 and the systematic error

IHO standard S-44 is often used (or misused) to specify the quality of a hydrographic survey. While it is a useful tool, it is easy to misinterpret. One ‘misuse’ is to...

Read more
Automatic calibration for MBES offsets

Automatic calibration for MBES offsets

Currently, calibration of multibeam echosounders (MBES) for hydrographic surveys is based on the traditional ‘patch test’ method. This subjective method, although rigor...

Read more
Sentinel-2 coastal charting worldwide

Sentinel-2 coastal charting worldwide

It is widely and wrongly assumed that the world’s coastal regions have been surveyed in detail by modern techniques and that the resulting nautical charts are an accurate ref...

Read more