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What Are Underwater ROVs & What Are They Used For?

Underwater ROVs (Remotely Operated Vehicles) are submersible, robotic systems, used to observe the depths of large bodies of water by operators from shore, or by divers in the water.

Everything You Need to Know About Underwater ROVs

ROVs range in size; they can be as small as a basketball to as big as a large SUV. The prices also vary greatly. They start at a few thousand dollars and can go up to millions of dollars. Underwater ROVs are used in a variety of industries: Search and Rescue, Military, Recreation and Discovery, Aquaculture, Marine Biology, Oil, Gas, Offshore Energy, Shipping, Submerged Infrastructure, and more. They allow operators to capture photo and video footage to investigate and monitor ports, harbours and vessels, bring innovation to pipe inspections and explore the depths of our oceans, lakes and rivers.

Four Classes of ROVs

deep trekker dtg3 underwater rov drone
Deep Trekker DTG3

Work Class ROV

A work class ROV is used for ocean floor exploration and inspections at depths that divers are often unable to reach. They act as a safe alternative to divers and are often used in offshore energy projects and deep archaeological investigations.

Light Work Class ROV

A light work class ROV is ideal for moderate to deep depths; the ROV is deployed from ships in lieu of divers to explore. It can be used during inspections to make repairs. Large extensions, such as laser scanners or specialized inspection devices and sensors, can be added on.

Observation Class ROV

An Observation Class ROV is small in size, used to explore lakes, rivers and coastal waters. They are often used to test water safety prior to a diver during mission and conduct inspections, equipped with sonar and custom sensors.

Micro or Mini ROV

The micro or mini ROV is the smallest class, often used to inspect hard to reach areas at shallow depths, such as pipe systems and submerged infrastructure.

Learn more about Deep Trekker ROVs

Origin and History

underwater ROV history
Underwater ROV History

Remotely operated vehicles were first tested in the 1960's by the U.S. Navy to retrieve sunken data. In 1966, the Navy’s Cable-controlled Underwater Recovery Vehicle (CURV) successfully recovered an atomic bomb that went missing off the coast of Spain.

In 1973, the crew from Pisces – a notable deep-sea submarine that sunk off the coast of Ireland - was saved by a remotely operated vehicle. Over the course of the following decade, underwater ROVs became a crucial system used in various industries.

Work class ROVs were the pioneers and are still being widely used today. Observation ROVs are the newest to the market; however, they have filled the gap, specializing in shallow water observation and inspections.

Benefits of the Modern Underwater ROV

deep trekker dtg3 underwater with divers
Diver Certification ROV

Quick Deployment

Due to its compact design and easy to use technology, underwater ROVs can be deployed in a moment’s notice. This is highly beneficial in emergency situations where time is limited, and in areas that are too narrow or difficult to reach by divers. Deep Trekker ROVs can be deployed in as little as 30 seconds.

Minimal Maintenance

Underwater ROVs are robust and rugged in design, built to withstand harsh water environments, and require minimal maintenance. Typically, ROVs can last years without the need for major repairs.

Extended Dive Times

Depending on the conditions and type of operation, divers can only remain submerged underwater up to 30 minutes to an hour at a time and most jobs require a dive team consisting of 2-3 divers - commercial diver, standby diver, and supervisor - for a single mission. Depending on its battery life, an ROV can remain underwater for hours on end. The Deep Trekker DTG3 ROV for example, has a battery life of up to 8 hours.

Video Recording Capabilities

One of the most remarkable benefits of the ROV is its photo and video recording capabilities; they can provide high resolution footage. In dark and murky waters, an ROV can be deployed to record, and later be reviewed for documentation and results. Alternatively, the footage can be edited to serve for documentary programming.

Fit into Confined Areas

Depending on its size, an ROV is capable of maneuvering and inspecting small and hard to reach areas. This is critical when collecting data that would otherwise be unattainable by divers.


ROVs provide a safe alternative to explore dangerous areas for divers. Both from shore, or by divers in the water. An ROV can be deployed in underwater locations to gather remains and collect data. In situations where divers are needed, ROVs can inspect critical areas, while the diver determines the safest possible route.

Easy to Use

Mini ROVs are often equipped with a handheld controller which greatly reduces the learning curve. Learning the controls can take as little as a few minutes for familiarization, a few hours for proficient piloting, and a weekend to become an expert.


In comparison to larger submersibles, a micro ROV is much more cost-effective. A micro ROV is great for anyone interested in exploring narrow underwater areas and gathering footage or collect data; it is also a very affordable option.

Read more: Vessel Inspections: How to Save Thousands of Dollars 

Learn more about Deep Trekkers ROVs

Underwater ROVs in Various Industries


deep trekker aquaculture underwater rov

Aquaculture is a key source of food, nutrition, income and livelihoods for millions of people around the globe. ROVs are used in aquaculture for a more efficient performance of net inspections, lighting, feeding, trouble shooting and stock monitoring. The use of underwater ROVs has proven to be a cost effective way for fish farmers to ensure healthy fish crop, efficient harvest and environmental protection.

Commercial and Salvage Diving

deep trekker commercial dive underwater rovs

The more commercial or salvage divers know about the underwater environment surrounding them, the easier it is to prepare for and mitigate risks. ROVs are an essential tool in ensuring a higher level of diver safety.

Learn how Deep Trekker ROVs increase safety for commercial and salvage diving

Read more: Mini-ROV and your Commercial Diving Company 

Municipal Infrastructure

deep trekker deploying DTG2 off bridge to test aging infrastructure

Routine inspections are critical to the long-term care and success of any type of infrastructure. With underwater infrastructure, routine inspections such as dam, bridge and reservoir inspections were traditionally difficult and often dangerous. ROVs are now being used to perform infrastructure inspections of pipeline systems so that divers are not put in harm's way.

Learn about Deep Trekkers products and the easy-to-use solutions for infrastructure inpections

Read more: Aging Infrastructure Inspections: Surveying the Dinosaur


deep trekker and military underwater ROVs

Threats to security are often hidden in underwater locations, either as discarded evidence, contraband travelling on ships, or explosives placed to cause destruction. An ROV gives a safe view of threats and evidence that is hidden beneath the waves, without jeopardizing diver's safety.

Learn how Deep Trekker can get eyes in the water in 30 seconds

Read more: Robots to the Rescue: ROVs for Search and Rescue

Environmental Research

deep trekker rov research water sampling

ROVs are used to help with environmental research and surveying our oceans for evidence. The cost and risk for divers to perform research dives can prohibit environmental organizations from moving forward. An ROV provides a cost-effective alternative to fully utilize research grants and funding.

See how Deep Trekker can help you easily perform inspections, data collection, and more

Learn more: Climate Change Research: Underwater Drones used to Monitor Marine Health

Oil and Energy

oil industry underwater rovs inspection

As the population grows, the need for efficient production and delivery of energy is becoming more pressing. All forms of energy require infrastructure underwater: wind, solar, oil and gas, nuclear, and hydroelectricity. An ROV offers an alternative to sending divers underwater to perform needed emergency or routine inspection work. ROV inspections are safe, efficient and lessen the environmental impact from periodic monitoring and inspection.

Learn about Deep Trekker ROVs rugged and robust features of a Work Class ROV

Read more: How a Hydroelectric Engineering Firm is Generating More Business using Underwater Drones


deep trekker DTG2 for the shipping industry

Periodic inspections of boat hulls during transit and when entering ports are a necessity to monitor: a vessel’s structural integrity, the potential transfer of an invasive species, or contraband smuggling. An ROV provides an affordable, user-friendly way to perform marine surveys, hull and ship inspections and ballast tank inspections without the need for diver intervention.

Underwater Discovery

deep trekker DTG2 exploring underwater

As we discover more and more about our earth, the desire to understand what we cannot see beneath the waves is greater than ever. Many discovery expeditions now make use of specially designed ROVs; these are equipped with cameras to mitigate risks and help divers with imaging and video recording capabilities.

See how Deep Trekker can help anyone discover the underwater world

Read more: Searching for the Avro Arrow with an Underwater Drone

Deep Trekker Underwater ROVs

Underwater exploration, inspection and monitoring is critical across various industries. As more and more industries find new ways to utilize ROVs, the market continues to expand. At Deep Trekker, our vision is to make the underwater world accessible to everyone. To do so, we offer robust, capable and easy to use underwater ROVs that can be deployed within a moment’s notice – to gather information and to serve as an accompaniment during diving missions.

deep trekker DTG2 UNAM project mexico

To learn more about our submersible ROVs or to receive a quote, visit our website or contact us here.