Summary Response Draft 1

     

The webpage “DTG3 ROV” from Deep Trekker (n.d) introduces its underwater ROV (Remotely Operated Vehicles) “that observes the depths of large bodies of water by operators from shore”. According to Deep trekker, the DTG3 ROV is a mini observation-class underwater ROV build to deploy rapidly and quickly conduct visual inspections in underwater environments. The DT3G is the most portable ROV which provides an exceptional 4K camera in a durable yet lightweight vehicle (Deep Trekker, n.d). Deep Trekker states in its webpage that the DT3G could be a deployed within 30 seconds and has a battery life up to eight hours. It is also equipped with three thrusters and a patented pitch system, that allows for flexible operations and descent capabilities (Deep Trekker, n.d). The webpage also highlights about DTG3’s 270-degree rotating camera that offers a massive range of view for ship hulls, sea floors, and everything in between, without the need to maneuver the thrusters. According to Deep trekker, DTG3 ROV has a depth rating of 200m and comes along with several add-ons such as the grabber, laser scaler, USBL positioning, thickness gauge, environmental sensors and extended tether. The Revolution ROV has 6 thrusters compared to the DTG3’s 3 thrusters, which allows the Revolution ROV to have better lateral movement and maximum control. It also has a revolving camera head which comes along with powerful LED floodlights and a laser scaler, which helps to locate targets on the seafloor. Whereas the revolving camera head feature is not present in its counterparts DTG3 and the Pivot ROVs. Hence making the Revolution ROV the best ROV among Deep Trekker’s ROV lineup.

 

There are many types of thrusters, such as general, ducted, channel, water jet, flat, magnetic fluid, and vector thrusters (Zhu, 1992). The current research of thrust distribution in ROV assumes that the hydrodynamic performance of the thruster is known, and the flow field is uniform (Wu, 2017). According to Deep trekker, The DTG3 uses the 3-thruster design which enables the operator to manipulate the pitch or yaw for vertical and lateral movements. Unless if a precision thruster is added to the DTG3, the operator doesn’t need use the pitch function and can change depths without the need to rotate the ROV, thus making it ideal for the trickiest of observation and inspection needs (Deep Trekker, n.d). In comparison to the Revolution ROV’s 6-thruster design that provides unmatched control in harsh underwater conditions, and when combined with its 305m depth rating, making it ideal for complex deep ocean missions (Deep Trekker, n.d). Out of the 6 thrusters in Revolution ROV, two of them are vertically mounted for precise vertical movements and depth holding and the remaining four are mounted horizontally and in a vectored configuration to allow for lateral movements. A large bollard pull thrust is required in an ROV, so the ducted propellers are used in the vector layout propulsion system for greater thrust (Science-Direct, n.d). This proves that the vectored configuration of the revolution ROV is more efficient and provides greater thrust compared to the 4-thruster design of the DTG3 ROV.

 

 

Deep trekker states that the DTG3 has full HD internal camera that comes with a zero-latency viewing on the handheld controller along with the 270-degree rotating field of view. It could take also switch photo mode to snap photos up to 8 megapixels (Deep Trekker, n.d). In comparison to the Revolution ROV, which consists of 260-degree revolving head camera at the front of the vehicle (Deep Trekker, n.d). The revolving head camera has ultra-high-definition which allows you could see the view from its controller (Deep Trekker, n.d).In addition to this, the revolving head camera comes with powerful LED lights and laser scaler which helps you identify the hull of a ship or targets on the seafloor (Deep Trekker, n.d). This brings us to the fact the revolving camera has higher resolution than HD camera of DTG3 which allows to view targets on seabed more in depth making it to be more effective than the HD camera of the DTG3.

 

The DTG3 is the ultimate ROV in portability and is cost effective alternative to the Pivot or the Revolution ROV (Deep Trekker, n.d). The DTG3 ROV also has higher battery life compared to the other ROVs in the Deep Trekker line up (Deep Trekker, n.d). This highlights that the DTG3 excels better than the Revolution ROV in certain aspects.

 

In conclusion, the revolution ROV deems to be the most powerful and stable ROV in the Deep Trekker line up. Its key features such as its revolving head camera, stable six-thruster control and durable construction gives it an edge compared to the other models of the ROV.

 

References:

 

Deep Trekker (n.d) ROV Buying Guide| Everything You Need to Know Before You Buy https://www.deeptrekker.com/resources/rov-buying-guide

https://www.sciencedirect.com/science/article/pii/S0029801820305539