Bathymetric surveys have been carried out regularly the past years and ranges from extensive team surveys to surveys of a small project areas carried out with open dinghy's.

Past key experience:

• Bathymetric survey of 100 km long shore coastline of the Guyana
- Valeport Midas surveyor echosounder, 33 & 210 KHz with internal GPS
• Bathymetric survey of 350 km of the River Niger from Lokoja to Aboh
- Navisound 420 (dual frequency) and Navisound 210
- Ashtech-z extreme RTK for benchmarking
• Bathymetric survey of river entrance of Bonny River, Nigeria
- Valeport Midas surveyor echosounder (Dual Frequency with internal GPS)