hydrographic survey
Charting underwater terrain
A hydrographic survey measures and maps bodies of water—their depths, shorelines, currents, and underwater features.
Such surveys produce nautical charts essential for safe navigation, port development, and underwater construction.
The hydrographic survey revealed a previously unknown reef near the harbor entrance.
- tidesPeriodic sea-level changes
- tidal rangeExtent of tide fluctuation
- transectObservation path for surveys
- sonarUnderwater detection by echoes
- bathymetrySubaqueous topographical measurement
oceanography · geodesy · chart datum · safe passage · cartography · currents · thermoclines · lead line · multibeam sonar · continental shelf · photogrammetry · water depth · ocean basins · magnetometer · shoal · estuaries · GPS · sedimentation
- maritime operationscoast guard, coastal patrol, harbor patrol, naval patrols, patrol boats
- surveyingsurveyor, theodolite, land surveys, triangulation, traverse
- bathymetrydepth sounding, echo sounder, echosounder, fathom, depth chart
- Frogmenfrogmen, combat divers, dive teams, Navy SEALs, divers
- oceanographyoceanography, oceanographer, sonar, marine science, ocean circulation
- geography booksworld atlas, geography textbook, world geography, physical geography, gazetteer
data collection vs. data absence
hydrographic surveyuncharted waters
Unexplored or unfamiliar territory