Underwater Drone Pros and Cons

Are underwater drones the best option for exploration, inspections, research and fishing?

Underwater drones have opened up a new way to explore and view the underwater world without getting in the water.

They are used across a wide range of applications, including exploration, inspections, marine research and fishing. From surveying reefs and checking boat hulls to observing fish behaviour, underwater drones offer flexibility and control in environments that are otherwise difficult to access.

However, while the concept is appealing, real world use can be more complex. Setup, conditions and usability all play a major role in how effective they are.

In this guide, we break down the pros and cons of underwater drones, where they make the most sense, and when a simpler underwater camera system may be the more practical option.

What Is an Underwater Drone?

An underwater drone, also known as a remotely operated vehicle, is a tethered device that can be controlled underwater while transmitting live video back to the operator.

FIFISH V EVO underwater drone shown with tether for live underwater viewing

Most systems include:

  • A camera and lighting system
  • Thrusters for movement and control
  • A tether for power and signal
  • A controller and viewing screen

Some models also include recording, sensors and advanced navigation features. For a general overview, see this ROV overview.

popular underwater drones including Chasing Dory Gladius Mini and PowerRay models

Some of the most recognised underwater drone brands include QYSEA FIFISH, CHASING and PowerVision PowerRay.

These systems demonstrate what underwater drones can do, from exploration and filming to inspections and research. However, they also highlight many of the trade offs discussed below, including cost, complexity and the need for active operation.

Where Underwater Drones Are Used

Underwater drones are used in a variety of environments where remote viewing and control are required.

  • Exploration, surveying reefs, wrecks and underwater environments
  • Inspections, checking hulls, moorings, infrastructure and confined spaces
  • Research, observing marine life, habitats and environmental conditions
  • Filming, capturing dynamic underwater footage
  • Fishing, scouting structure, bait and fish behaviour

This versatility is one of their biggest strengths, but it also highlights where simpler tools may be more effective depending on the task.

Pros of Underwater Drones

underwater drone exploring reef and shipwreck with live camera and tether

Full Movement and Control

Underwater drones can move freely in multiple directions, allowing users to explore large areas and navigate around structures.

Real Time Underwater Viewing

Most underwater drones provide a live video feed, making them useful for inspections, research and observation.

High End Imaging Capabilities

Many drones include high resolution cameras and lighting systems, making them suitable for detailed inspections and filming.

Multi Purpose Use

A single system can be used across multiple applications, from recreational use to commercial inspections.

Cons of Underwater Drones

underwater drone tether tangled on reef showing snagging and current issues

Requires Full Attention to Operate

Underwater drones must be actively piloted. This means you cannot easily perform other tasks at the same time, which can be limiting in real world scenarios.

Disorientation and Control Challenges

Without clear reference points underwater, it can be difficult to judge direction, distance and position, making precise control challenging.

Tether Management and Snagging

Most underwater drones rely on a tether, which can snag on structures, limit movement and require constant management.

Performance in Real Conditions

Strong currents, low visibility and obstacles can reduce control and stability, making drones harder to use effectively outside of calm environments.

Setup Time and Complexity

Underwater drones take time to set up and operate, which can make them less practical for quick or repeated use.

Built In Cameras Become Outdated

Most underwater drones use built in cameras, which cannot be upgraded and may become outdated as technology improves.

Where Underwater Drones Make Sense

  • Exploring large underwater areas
  • Filming and content creation
  • Open water research

In these situations, their control and flexibility can justify the complexity.

Where Underwater Drones Fall Short

  • Quick inspections
  • Working in current or tight spaces
  • Repeated viewing tasks
  • Situations where you need to multitask

In these cases, simpler systems are often more practical and reliable.

A Simpler Alternative for Inspections, Research and Fishing

Seavu Explorer underwater camera system with GoPro and black trolling fin mount

For many applications, the goal is not to explore freely, but simply to see clearly and consistently underwater.

Systems like Seavu take a different approach by focusing on stable live viewing rather than piloted control.

Built In Cameras vs Upgradeable Systems

Most underwater drones rely on built in cameras, locking you into a fixed system. As camera technology evolves, these systems can quickly become outdated.

Seavu systems use action cameras such as GoPro and DJI Action cameras, allowing you to upgrade your setup over time.

This provides better long term value and keeps your system current without needing to replace everything.

Why This Approach Works

DJI Osmo Action 5 Pro in Seavu Explorer housing with underwater live view system
  • Simple setup and deployment
  • Stable viewing in real conditions
  • No piloting required
  • Easier cable management

Instead of controlling a device underwater, the focus shifts to observing what is happening, which is often more practical.

Underwater Drone vs Seavu System

FeatureUnderwater DroneSeavu System
MovementFull controlFixed or guided
OperationRequires pilotingPassive viewing
SetupComplexSimple
StabilityVariableConsistent
CameraBuilt inUpgradeable
Best forExploration and filmingInspections, research and fishing

Final Thoughts

Underwater drones are powerful tools, particularly for exploration and filming where movement and control are essential.

However, they are not always the most practical solution.

For many real world applications, especially inspections, research and fishing, simplicity and reliability are often more important than full control.

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Frequently Asked Questions

An underwater drone, also known as a remotely operated vehicle, is a device that can be controlled underwater to capture live video and explore below the surface. Most underwater drones use a tether to transmit video and receive control signals.

Underwater drones can be useful for exploring new areas and locating fish, but they are not always practical while actively fishing. They require full attention to operate, which makes it difficult to fish at the same time. Many anglers prefer simpler systems like Seavu that allow real time viewing while continuing to fish.

Underwater drones can struggle in current. Strong water movement can push them off course, making it difficult to maintain position and control. This is one of the main limitations of underwater drones in real world conditions.

Most underwater drones use a tether for power and signal. While this provides a stable connection, it can limit movement and increase the risk of snagging on reefs, structures or debris.

Yes, underwater drones are commonly used for inspections such as checking boat hulls, moorings and underwater infrastructure. However, they can be complex to operate. In many cases, fixed underwater camera systems like Seavu offer a simpler and more reliable alternative for inspections.

Underwater drones can be challenging to use, especially for beginners. They require piloting, orientation control and constant attention. Conditions like visibility and current can also make them harder to operate effectively.

An underwater drone is actively controlled and can move freely, while an underwater camera system like Seavu is typically fixed or guided. Camera systems focus on stable, real time viewing, making them easier to use and more practical for tasks like fishing, inspections and research.

Many underwater drones offer high quality video, including HD and 4K. However, most use built-in cameras that cannot be upgraded. Systems like Seavu use action cameras such as GoPro and DJI, allowing users to benefit from ongoing improvements in camera technology.

Underwater drones can be worth it for exploration, filming and open water research. However, for many practical applications such as fishing and inspections, simpler systems that provide stable real time viewing are often more effective and easier to use.

The best alternative depends on the use case. For fishing, inspections and research, systems like Seavu provide a simpler solution by delivering stable live underwater viewing without the need for piloting or complex setup.

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1. Definitions and Interpretation

1.1 Definitions

In this Agreement the following definitions apply:

  1. Ambassador means the key person set out in item 1 of SCHEDULE 1
  2. Ambassadorโ€™s Commission means the commission to be paid to the Ambassador by the Company for Ambassador referred sales as set out in SCHEDULE 4.
  3. Commencement Date means the date set out in item 1 of SCHEDULE 1;
  4. Discount Codes means the discount code or codes set out in item 1 of SCHEDULE 4.
  5. Endorsement Services means the promotional and endorsement services provided by the Ambassador that are referred to in clause 3(a) and set out in SCHEDULE 2;
  6. Intellectual Property means any and all intellectual and industrial property rights that are described in SCHEDULE 3;
  7. Products means the goods to be endorsed by the Ambassador that are described in SCHEDULE 5, including new Products that may be produced by the Company as agreed in writing between the parties;
  8. Promotional Material means the promotional material for the Products created by the Ambassador using the Intellectual Property, including name, likeness or signature of the Ambassador, and the photographs and video material including the Ambassador that the Ambassador creates as the result of the Ambassador providing the Endorsement Services;
  9. Term means the period of time described in clause 2 and item 3 of SCHEDULE 1;
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1.2 Interpretation

In this Agreement:

  1. a reference in this Agreement to a statute or a section of a statute includes all amendments to that statute or section passed in substitution for the statute or section referred to and incorporating any of its provisions;
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  10. reference to any agreement or other document annexed to or referred to in this Agreement includes any amendments to it and any documents in addition to or in substitution for it which has been approved in writing by the parties to this Agreement.

2. Commencement and Term

This Agreement commences on the Commencement Date and continues subject to any rights of early termination under clause 8 for a period of time set out in item 3 of SCHEDULE 1.

3. Endorsement and Promotion of Products

  1. The Ambassador agrees to:
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    2. use reasonable endeavours to promote the Products in a matter consistent with the authorised use of the Products on the Ambassadorโ€™s social media accounts and website;
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4. Intellectual Property

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The Ambassador warrants during the Term of this Agreement that:

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13. Further agreements

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14. General provisions

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