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Marine Firefighters of Marseille Test the Elios 2 for Ship Rescues

The Marine Firefighters of Marseille tested the Elios 2 for investigating accidents and preparing for rescues on boats.

Benefits in a nutshell


Collecting visual and locational data about a ship before entering it can help firefighters improve the safety of their operations and understand the situation without staff indoor.


Flying a drone inside a ship presents unique challenges to signal strength and stabilization, and an increased potential for collisions. The Elios 2 met all of these challenges and exceeded the expectations of the firefighters.


The Elios 2 was able to fly within all parts of the ship, allowing the firefighters to collect visual data everywhere they needed to in order to assess the situation.  


When the Marine Firefighters of Marseille are called to help a distressed boat, they often don’t have very much information about what is going on inside the vessel. In a short period of time, the firefighters have to make the difficult decision about whether to board the vessel in order to save it and anyone onboard in need of rescue. The primary challenge with accidents is knowing where they need to focus their efforts.

Customer Needs

The Marine Firefighters of Marseille currently use two outdoor drones in their work, which can help them see what’s happening outside a distressed ship before boarding it. But for most of the inside of the boat, they have almost no visual data prior to boarding.

To improve safety by increasing situational awareness prior to boarding a distressed vessel, the firefighters wanted to test an indoor drone on a real ship to see if it might be able to livestream visual data while the pilot and firefighters stayed safely off the distressed ship.

trò chơi xổ sốLiên kết đăng nhập

This visual data could help firefighters decide whether to board the ship at all, as well as helping them identify where to focus their efforts once on board. The ability to make these determinations remotely—that is, without the firefighters having to physically board the ship—could be crucial for saving those trapped in a fire, and it could also improve safety for firefighters by reducing their exposure to dangerous situations. In testing an indoor drone, the firefighters had four areas they wanted to cover:
  1. Signal strength. How far can the drone fly inside the ship before the signal starts to fail?
  2. Stability. Are there any difficulties with the drone’s stability while in flight?
  3. Collision tolerance. How does the drone perform during collisions?
  4. Battery life. Does the drone’s battery life present an obstacle to the work needed?


In their search for an indoor drone that could be used to investigate distressed ships, the Marine Firefighters of Marseille decided to test Flyability’s Elios 2. It sits in a protective cage that makes it tolerant to collisions, allowing it to hit walls and ceilings inside confined spaces and continue flying unharmed.

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The location the firefighters chose for the test was a cruise ship made to hold up to 181 passengers. The cruise ship presented a realistic testing ground for the Elios 2 since it contained the kind of complicated, hard-to-navigate indoor scenarios that the marine firefighters encounter in their work. In total, the ship contained nine decks (five of which were cabin decks) and two engine rooms. It was 429 feet (131 meters) long and 59 feet (18 meters) wide.


The Elios 2 test was a success across the board. 

trò chơi xổ sốLiên kết đăng nhập

With a pilot standing outside of the cruise ship the Elios 2 was able to fly throughout the vessel, collecting visual data on the status of various parts of it.
Here is how the Elios 2 performed related to the four features the firefighters wanted to test:

1. Signal Strength

Lower decks—Signal strength was good in the lower deck (i.e., the underwater level), and the pilot was able to fly in one full engine room and part of the corridor. The signal continued to work well two decks underwater. It was lost when one of the watertight doors were closed between the drone and the pilot, but this distance was more than sufficient for the firefighters’ needs, and met the criteria for the test.

Passenger decks—As expected, the signal was much stronger on the passenger deck than on the lower decks. Standing outside the ship, the pilot was able to inspect two full passenger decks over three levels. At one point the signal flagged so the pilot walked a few feet alongside the ship to improve its strength.

2. Stability

The Elios 2 stayed stable throughout the test flights. Despite each room containing various features that made flying complex—especially in the engine rooms—the Elios 2 was able to maintain its stability and satisfy the requirements of the firefighters.

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3. Collision tolerance

The Elios 2’s collision tolerance came in useful during the test flights when a mechanic opened a door, causing a big draft of wind to sweep through the room and throw the drone into a pillar. The drone continued flying immediately after the collision, with no resulting crash, and there were no further collisions throughout the test.

4. Battery Life

Battery life did not present any issues throughout the test flights. The firefighters were able to collect all the visual data needed by using the Elios 2’s ten minutes of battery life (though they did use multiple batteries to do so).

[Related read: Is Ten Minutes of Flight Time Enough?]


In the eyes of the Marine Firefighters of Marseille, the test mission with the Elios 2 was a success. The most important place for them to test the indoor drone was the lower deck, and the Elios 2 performed well there, collecting visual and locational data that could help improve safety and increase efficiency for future marine fire rescue missions. The firefighters are now in the process of determining next steps, and will soon make a decision about how to incorporate indoor drone technology into their marine fire rescues.


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