Our Survey Team and Survey Vessels are ready to mobilize with specialist equipment to carry out work ranging from Geophysical and Hydrographic Surveys,  Barge and Rig Positioning, Pipe Laying, ROV inspection and Tide Gauge Installation.

Surface Navigation, Motion and Orientation Systems

  • Applanix POS MV 320 GNSS Navigation, Motion and Heading Reference System
  • CODA F185R+ RTK GNSS Navigation, Motion and Heading Reference System
  • Trimble SPS855 RTK GNSS Navigation System
  • C-Nav Positioning and Navigation System
  • TSS Meridian Surveyor Gyro Compass

Bathymetric Survey System

  • R2 Sonic 2022/2024 170-450kHz Multibeam Echo Sounder System
  • Kongsberg EA440 38/200 kHz Single beam Echosounder System
  • Tritech Sub Bottom Profiler
  • Kongsberg MS1000 Sector Scan Sonar

Geophysical Survey System

  • EdgeTech 4125 Side Scan Sonar
  • Applied Acoustic Squid 500 Sparker
  • Applied Acoustics A200 Boomer Plate
  • Applied Acoustic AH360/8 Streamer Hydrophones
  • Applied Acoustic CSP Power Supply System with High Voltage Cable
  • Kongsberg GeoAcoustics GeoPulse Pinger
  • Tritech Sub-Bottom Profiler
  • CODA Octopus DA4G Sonar Acquisition System

Sub-Surface Positioning Systems

  • Sonardyne Ultra Short Baseline Line (USBL) System with beacons


  • QPS QINSy Software
  • Qimera
  • CODA Survey Engine Seismic+ (Next generation for GeoKit Seismic)
  • Trimble HydroPro
  • Hypack

Sound Velocity

  • Valeport Ultra SV Sound Velocity Sensor
  • Valeport SWiFT SVP Sound Velocity Profiler

Tide Gauge and Reporting System

  • Valeport TideMaster and GPRS Telemetry System


  • Seatronics Predator Inspection Class ROV

Sample Bathymetric Survey

Sunken ship in Victoria Harbour. Surveyed with Ultra High Resolution MBES at depth of 25m.

Find Inshore Capability Statement here..ESL Capability Statement – 2020 – Rev4 (Paul)

ESL currently operate 2 specialist Hydrographic Survey Vessels in Hong Kong allowing fast reaction and the right platform for each task. We also operate a shallow water tender for operations in water <2.0m depth.