Direct firefighting in shipping containers

Innovative & award winning firefighting equipment that can perform fully automatic & direct firefighting in containers both at heights, at deck level & below deck

An industry pain

Today it is not possible to perform direct firefighting in a burning container at heights. The crew does not stand a real chance of fighting the container fire efficiently.
Container fires both at deck level and below deck level are inefficiently fought today and puts the crew in a very dangerous situation.
If a container fire is not addressed fast and efficiently it will spread quickly and it can lead to significant human – and financial costs.
The Danish Maritime Accident Investigation Board, case number: 2013010519

Value proposition

The HydroPen system makes it possible to directly extinguish a container fire at heights, at deck & below deck on board a cargo vessel. No other solution can do that.

The system will perform a fully automatically water-based penetration of the container door and afterwards perform direct firefighting inside the container.

Value propositions of the HydroPen System
With a minimum of manual work the HydroPen will either be hoisted to the burning container at heights or deployed on the critical container within reach of a man.

The HydroPen will improve the safety for the crew, the cargo & the ship, and it will help the ship owner avoid significant fire related costs.

The HydroPen system – Fighting container fires smarter and more efficiently than ever seen before.

The HydroPen is a new innovative and ground-breaking technology that can fight container fires on board container ships. The HydroPen is a water-based drilling machine. It uses only water pressure from the fire main to drill through a standard steel container door.
Container firefighting at heights
Container firefighting at deck level

The HydroPen & Lift

To perform direct firefighting at height the HydroPen must be used together with the telescopic lift.

The combination of the HydroPen and the lift enables the ground-breaking feature of reaching containers at fire at heights and to fully automatically extinguish the fire inside the burning container with direct firefighting as soon as it has been mounted on the container door.

The HydroPen
Direct container firefighting at heights

How does it work?





Mounting the Hydropen with the telescopic lift
  • Locate the area with the burning container.
  • Hoist the telescopic lift to the specific burning container by attaching the lift to the locking bars.
  • Winch the HydroPen to the end of the telescopic lift and turn on the water supply from the fire main.


Drilling through the burning container with the HydroPen
  • The water pressure flows into a hydrodynamic turbine, which rotates and drives the automatic drilling process.
  • A hole saw and a nozzle at the end of the HydroPen will penetrate the container.

Auto change & extinguishing

The HydroPen automatically changes mode and spray water inside the burning container and extinguish the fire
  • Once the hole saw and nozzle enter the container, the HydroPen automatically changes mode, shutting off the water supply to the turbine and instead guides the water through the nozzle to spray inside the burning container and creates immediate firefighting.

The concept in real-life

What is the HydroPen System?

The concept in real-life

What is the HydroPen System?

The HydroPen & HydroLock

  • An add-on device which is clicked on top of the HydroPen that enables container fire fighting on all reachable containers.
  • Replaces the current methods & significantly increases the fire safety.
  • Easy and fast deployment on the container by mounting it on the locking bar.
  • Water can be supplied quickly after deployment, which will initiate the automatic fire fighting at safe distance.

Watch the video

The HydroPen & Foam

  • Use the HydroPen normally to drill through the container by using water pressure.
  • Keep the HydroPen on the container after the penetration is done and then disconnect the fire hose from the fire main and empty the water from the hose.
  • Connect the foam inline inductor to the fire hose and activate the water flow again and the container will be filled with foam at safe distance.
  • The efficiency and safety of fighting Class A & B fires will increase.

Watch the video

Watch the video

The HydroPen & CO2

  • Use the HydroPen normally to drill through the container by using water pressure.
  • Keep the HydroPen on the container after the penetration is done and then disconnect the fire hose from the fire main and empty the water from the hose.
  • Connect the HydroCO2 and activate the CO2 bottle to start filling the container with CO2 at safe distance.
  • The efficiency and safety of fighting Class A & B fires will increase.


Fully automated penetration and fire extinguishing
Automatically changes function from penetration mode to fire extinguishing mode and kills the fire inside the burning container.
The HydroPen can operate both at heights & on reachable containers
The telescopic lift makes it possible to reach a burning container at heights. The HydroLock enables firefighting in containers at deck level and below deck.
100% fire main powered - no electricity required &
Water pressure from the already existing fire main system on board vessels create a fast penetration and flow rate.
Simple to operate and mount on the critical container
The mounting process relies only on manpower. It requires little training and low maintenance. The HydroPen System weighs only 9 kilograms.
Protects the crew, the cargo & the ship
The crew can retreat to safety immediately after mounting the Hydropen System, which enables them to keep at a safe distance. It can be used on any ISO shipping container.
Avoidance of significant cost impact - up to $2 million
Minimizes spread of fire to other containers and the need for deviation from the route. Water throw length reaches a full 40 ft container.


The HydroPen is Type Approved as a “water mist lance” for marine use on board seagoing vessels according to SOLAS Resolution MSC 365(93) 10.7. by DIFT – Danish Institute of Fire Technology – which is a recognized test laboratory by IMO and on behalf of the Danish Maritime Authority.


The technology and combination of work processes in the HydroPen system is patent pending according to the International Patent Cooperation Treaty (PCT) administrated by the World Intellectual Property Organization (WIPO).

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Contact VIKING Life-Saving Equipment

VIKING is our global sales & distribution partner
Lasse Boesen
Product Manager Trade
Louise Soegaard
Global Trade Executive

Contact us

Technical inquiries
Jesper Rosenfeldt Hansen
+45 6169 8177
Commercial inquiries
Martin Winkel
+45 4042 4168
Other contacts
General inquiries and information

Write us

Danneskiold-Samsøes Allé 41, 1434 Copenhagen

Rosenby Engineering - Administration

Langelinie Allé 47 2100 Copenhagen Ø
Development & workshop
Bautavej 1A 8210 Aarhus V

Rosenby Engineering - Development & Workshop

Bautavej 1A 8210 Aarhus V Denmark


Board of directors

Jesper Rosenfelt Hansen

Jesper Rosenfelt Hansen


Martin Winkel

Martin Winkel


Steen Ulf Jensen

Steen Ulf Jensen


Steffen Conradsen

Steffen Conradsen

Member of the board

About the company & idea

Rosenby Engineering develops high-quality solutions for complex problems in the marine industry. The company has obtained valuable knowledge and insight from the founder’s maritime careers on a variety of maritime positions and ship types. This has driven Rosenby Engineering to develop and engineer The HydroPen system, which is safe and easy to use for all crew members in emergency situations.
The purpose of Rosenby Engineering is to improve container fire safety and conquer the global container fire equipment market. The company aims to decrease risk to personnel, ship, cargo and the environment by solving complex problems with simple technologies.

Rosenby Engineering was founded in 2016. The daily operations are carried out by the founders Jesper Rosenfeldt Hansen and Martin Winkel.

In 2017 Rosenby Engineering won the elite accelerator program for hardware tech start-ups “Danish Tech Challenge” hosted by DTU Science Park and Industriens Fond. The HydroPen system won the first place and DKK 500.000, which was handed over by His Royal Highness Crown Prince Frederik of Denmark.

In 2019 the HydroPen system was rewarded with the Safety at Sea Award for Best Safety Product of the Year within Firefighting.

Firefighting with The HydroPen

The mission

We want to rethink, optimize and revolutionize the global fire safety within the shipping container industry. It is essential for us to improve safety at sea and help prevent future casualties.

The vision

Our technology will ensure that you will be able to access all shipping containers on land, in open water and stacked at heights. Our technology will be the preferred and most widely used method to fight fires in shipping containers worldwide.


Danish Maritime logo
Danish Maritime logo
DBI Fire and Security
DBI Fire and Security
The Danish Maritime Fund
DTU Science Park
European Structural and Investment Funds
Martime Center for Operations
Scale Up Denmark
Technological Institute
Development Center Northern Jutland
Kofod & Christensen Machine Factory
Innovation Fund Denmark
Danish Export Association
Danish Export Association