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HYDRO 300 Photogrammetry


Committed to staying at the forefront of marine engineering, we invested in a HYDRO 300 Photogrammetry system in (month?) 2023.

Fully trained by IMV Technologies in Marseilles, France, our team of highly skilled ROV technicians have already reaped the benefits of the HYDRO 300’s light, compact inspection and reconstruction capabilities for uncharted, shallow waters.



Working independently from any navigation aid and supported by its integrated lighting, the HYDRO 300 enabled us to map a millimetre perfect 3D model of an unspecified 55m deep x 4m wide water filled shaft and underground cavern system which was uncovered at a UK city centre building site.


Timely, accurate modelling detailing location, depth and dimensions of the subterranean structure was vital in order for the client to assess the viability of their current and any modified building plans. Following our site survey using the ROV mounted HYDRO 300, we were able to produce a full structural report, technical drawings and plans within days.

The HYDRO 300 Photogrammetry system works by taking eight pairs of photos per second as the ROV is moving. These photos are then overlapped to create an accurate 3D model which can be opened in AutoCAD for analysis by your engineers.


An adaptation of the HYDRO 300 system was also used to create the first full-sized digital scan of the Titanic, which lies at  a depth of 3,800m (12,500ft) in the Atlantic Ocean. The HYDRO 300’s unique 3D view of the entire ship has enabled it to be seen as if the water has been drained away. It is hoped that this will enable forensic investigators to ascertain more accurately what happened to the liner, which sank in 1912.


The HYDRO 300 Photogrammetry system is ideal for offshore shallow water structures, mooring chain inspections, coastal civil assets, hull inspections, lake and dam infrastructures. We will shortly be employing its technological capability once again to conduct subsea inspections for an offshore windfarm client.

Technical Specification: 

Max depth: 300m

Temperature: 0 to 40°C

Size: 226 x 338 x 288 mm
Weight: 11.2kg in air; 2.2kg in water

Power/data: 48VDC (Different options available); 1Gb/s

Sub millimetric accuracy

Precalibrated - no scale bars

Real time 3D

High turbidity compatible

Diver kit available with subsea monitor

Fits all ROVs (observation, inspection, work class)

Housing Material: Aluminium

Lighting​: 4 strobe lights ​/ 75 000 lumen

​Sensors and processor: size - 1"; Resolution - 24M px

Field of view (V/ H): 63.8° / 79.2°

Processor: 64 Gb

Embedded data storage: 2 Tb

With our Reach Robotics tooling increasing, we purchased the Bravo Hub to allow us to easily power, add and remove items with minimal reconfiguration time. Plus our Falcon is limited to one ethernet port on the multiplexer and very little space in the VJB to accommodate additional devices. The Bravo Hub contains a subsea switch allowing us to run multiple ethernet devices on the machine simultaneously via the single ethernet port.


We also own a Hydro-300 photogrammetry system for underwater 3D modelling requiring gigabit speed, and a 24V ‘Orphie’ low-visibility IP camera. The team at Reach made some custom modifications to our Bravo Hub, increasing the speed of the switch to Gigabit and giving us both 24V and 48V outputs; this sort of collaboration has certainly set Reach Robotics apart as a supplier.


With the Bravo Hub and tooling skid we now run our Blueview sonar, Orphie camera, Hydro-300 Photogrammetry camera, the Bravo-3, Bravo-5 and its accompanying IP wrist camera simultaneously at up to gigabit speed.

Click here to read about our Photogrammetry System
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