The Siabo - A New Pilot Boat headed to Papua New Guinea

February 25, 2021

Brad Marsden

Director - Marine Air Flow International

35 Years Experience in the Marine Industry

View Brad's Info

Tropical Environment Patrol Boat System

We have worked closely with Norman Wright and Sons for quite some time now and it is always a pleasure to be involved in any of their projects.


This latest vessel, the "Siabo" is one of two pilot boats that will be patrolling the coastline of Papua New Guinea.



The engine room ventilation system was designed specifically for this project and incorporates a single grille as combined intake/outlet with dedicated internal ducts, fans and dampers to distribute and circulate the air correctly and efficiently. 


Operating in such extreme temperatures, it was essential that the Siabo has the best possible operating conditions to not only be economically viable, but to keep the crew safe. There isn't too many places on earth hotter and more humid than Papua New Guinea and it was our pleasure to design and construct a system for a vessel that is going to help keep our northern neighbours safe. 


The body content of your post goes here. To edit this text, click on it and delete this default text and start typing your own or paste your own from a different source.
A combination engine room ventilation system ready for Papua New Guinea pilot boat.

The Siabo system ready for despatch. 


A compact designed system, this was designed with a single mist eliminator grille as a combined intake and outlet with our compact fans for ventilation and air dampers for fire safety. As you can see from the pics below, the Siabo is a compact vessel, however it is still important to ensure correct air flow in a tight space.

Feedback From The Launch

We launched the pilot boat on Monday. First test run today. The feedback from the sea trial was that after coming back to the wharf the engine room is cooler than the wheelhouse! Very impressive. Thanks for your efforts. 


Adam Evripidou | Naval Architect | Norman R. Wright & Sons Pty Ltd     

The Siabo Launch

The Siabo - Pilot boat for Papua New Guinea on the boat sling
The Siabo in the water ready for sea trials
By Brad Marsden June 10, 2025
Optimising Engine Room Ventilation for Abu Dhabi’s High-Speed Ro-Pax Ferries As part of Abu Dhabi’s ongoing investment in advanced maritime infrastructure, the AD Ports Group commissioned two high-speed Ro-Ro ferries to operate between the UAE mainland and Delma Island. Carrying 250 passengers and 25 cars per trip at a service speed of over 30 Knots is pretty impressive , and you'd have to agree they are certainly very tidy looking Roll On Roll Off Ferries!! Designed for both passenger comfort and operational performance, these cutting-edge vessels required a ventilation solution that could meet the rigorous demands of the Gulf’s climate and the intense operating conditions of four powerful MTU engines per vessel. Our team was proud to be selected to design and deliver the engine room ventilation system for these state-of-the-art ferries, ensuring they remain safe, efficient, and reliable at sea. Engineering the Future of Fast Ferry Travel Built to carry up to 194 passengers and 25 vehicles, each of the 56-metre-long catamarans has been equipped with four MTU 16V4000M65L high-performance engines driving Kongsberg KaMeWa waterjets. This powerful propulsion setup enables cruising speeds of up to 35 knots, making the ferries among the fastest in their class within the region. Inside, the vessels feature modern amenities such as a VIP lounge, children’s play area, two cafes, five toilets, and full wheelchair accessibility, highlighting AD Ports Group’s commitment to both efficiency and passenger experience. Operating in the heat of the Persian Gulf, however, presents unique engineering challenges. The heart of this lies within the engine room where temperatures, airflow, and safety systems must be tightly controlled to prevent overheating, ensure compliance, and protect both crew and machinery. A Tailored Ventilation Solution for Demanding Conditions The brief for this project was clear: create a ventilation system that could not only manage the extreme thermal loads generated by four high-output marine engines but also comply with international marine safety standards, including fire isolation and redundancy protocols. Key features of the system we delivered include: Marine-Grade Ventilation Dampers : Built from corrosion-resistant stainless steel, our dampers are designed for longevity and reliability in a saltwater environment. Integrated Auto Close Capability : The dampers are configured to close rapidly in the event of a fire, helping to isolate the engine room and restrict oxygen supply. High Airflow Capacity : Designed specifically for the compact, high-output layout of the engine rooms, the system allows for maximum airflow and heat dissipation under full load. Moisture and Salt Mist Defence: Our Intake grilles are known globally for their excellent capability of reducing salt mist and spray into your engine room. Here they allow a vessel operating in already extreme conditions to require far less ongoing equipment replacement. Redundancy & Safety : With automated control options and manual overrides, the system ensures continuous operation and safety during engine shutdowns or emergencies. Delivering Results at Sea With the ventilation system now fully installed and operational, the Ro-Pax ferries have successfully completed sea trials and are ready to begin service. The performance of the engine room ventilation under load has exceeded expectations, maintaining optimal operating temperatures even during high-speed runs in the peak Gulf heat. In addition to thermal performance, the system’s fire isolation capability offers an added layer of safety, helping these ferries meet stringent international compliance standards while delivering peace of mind for operators and passengers alike. Reflecting on the Project This project underscores the critical importance of high-performance ventilation systems in modern vessel design. From the intense thermal loads of multi-engine configurations to the need for rapid fire response and corrosion resistance, every detail matters when it comes to marine safety and reliability. We’re proud to have played a key role in supporting this milestone for AD Ports Group and Abu Dhabi’s maritime future and we look forward to bringing this level of engineering excellence to future vessel builds across the region and beyond. Talk to Us About Your Marine Ventilation Needs Whether you’re designing a new-build high-speed ferry or retrofitting an existing vessel, we offer tailored ventilation solutions that combine safety, efficiency, and performance. Get in touch with our team today to learn how we can support your next marine engineering project.
Marine Air Flow has achieved JOSCAR certification, used by Military and Government organisations
By Brad Marsden June 5, 2025
Marine Air Flow has achieved JOSCAR certification, used by Military and Government organisations in Australia
Brad, Blake and Kal accepting an award.
By Brad Marsden June 4, 2025
Marine Air Flow is 20! Its been a huge 20 years and we have lots of people to thank. Check out how we got here.
A vessel in rough seas with multiple crew on deck.
By Brad Marsden February 19, 2025
Learn how Delta T optimizes engine room cooling on boats, ensuring performance, safety, and efficiency. Discover tips and trends for effective management.
Black Watch 40 with Marine Air Flow Teardrop Intake Grilles
By Brad Marsden January 30, 2025
Do you have a Black Watch 40 that has trouble with salt mist and over heating? You can retrofit an engine room ventilation system to solve that!
Marine Air Flow winning the 2024 Small Business Export Award
By Jenny Marsden November 23, 2024
We are very excited to announce that Marine Air Flow has won the 2024 Export Award for Small Business.
By Brad Marsden July 30, 2024
We are proud to announce we are the June 2024 winners of the Gold Coast Business Excellence Award.
The Woolgoolga RIB - another Marine Air Flow engine room ventilation project.
By Brad Marsden June 4, 2024
A new rescue vessel built by The Whiskey Group for the Australian Volunteer Marine Rescue team in New South Wales.
Svitzer Pilot transfer boat built by Dongara Marine with MAFI's engine room ventilation equipment.
By Brad Marsden May 29, 2024
Another completed project for Dongara Marine. This time a pilot transfer boat for Svitzer Marlin that will operate from Woodside Oil and Gas in the Pilbara.
North Sea Boats built X18 Armoured Troup Carrier with MAFI engine room equipment
By Brad Marsden November 13, 2023
North Sea Boats built X18 Armoured Troup Carrier launches with MAFI engine room equipment
More Posts