![](https://www.engsurveys.com.hk/wp-content/uploads/2020/02/IMG_5835-768x576.jpg)
ESL provide full Survey Support to marine construction including:
– Off Site fabrication survey
– Seabed Bathymetry and Geophysics
– Trenching and Dredging Survey
– Gravel Laying positioning and as-laid
– Precise positioning
– Backfilling and Volume computation.
Precise positioning system deployed on a gravel spreading barge
![](https://www.engsurveys.com.hk/wp-content/uploads/2016/11/GPS-Base-768x576.jpg)
The GNSS Base station installed by ESL to provide +/-10mm real time positioning 24/7 across Victoria Harbour. A licence from the Telecommunications Authority was required for such an installation.
![](https://www.engsurveys.com.hk/wp-content/uploads/2018/01/DJI_0332-768x576.jpg)
“ESL Survey 1” tied up alongside the last IMT unit to be deployed.
![](https://www.engsurveys.com.hk/wp-content/uploads/2016/12/USM-Mount2-768x1367.jpg)
USM mount mobilised on a Vessel of Opportunity. This is sometimes required to cope with spikes in workload.
![](https://www.engsurveys.com.hk/wp-content/uploads/2016/11/serv-inline1_2.jpg)
Seabed monitoring survey carried out in Victoria Harbour over a 3 year period.