Since 2019, we have transitioned to operating three new innovative and purpose-built ships, named after environmental champions and explorers – Greg Mortimer, Sylvia Earle and Douglas Mawson – that each feature more advanced technologies and designs.
Anti-Fouling Coating
Anti-fouling paints are used to coat the bottom of ships to prevent sea-life, such as algae and molluscs, from attaching to the hull. This build-up would otherwise slow the ship down and increase fuel consumption. While anti-fouling systems are important for efficiency, it is essential to use paints with the least adverse environmental impact. Anti-fouling coatings are mandatory for ships and harmful organotins in anti-fouling paints are prohibited.
Ballast Water Management System
Ballast water is seawater taken on board to maintain stability and trim. The concern with ballast water is that it can contain a range of marine organisms that may be carried from one region to another. Invasive aquatic species pose a serious threat to marine ecosystems, and ships are a major pathway for introducing species to new environments. In many parts of the world, the introduction of new species has caused devastating impacts, with the rate of bio-invasions continuing to rise. All ships are required to have ballast water management systems. Our vessels have a system that first filters out larger particles and organisms, then treats the water with UV light before it is discharged.
Heat Recovery System
Heat recovery systems capture excess heat from a ship’s engine to repurpose and provide heating to passenger cabins and warm water tanks. Due to its efficiency, many new ships have this system in place.
Heating, Ventilation and Air Conditioning Systems Optimisation
Heating, ventilation and air conditioning (HVAC) systems maintain indoor comfort and air quality. Optimisation enhances energy efficiency through technologies such as variable speed drives, energy-efficient motors and smart controls. Automation allows precise monitoring and adjustment of temperature, humidity and air quality, ensuring energy is only used when and where it is needed, preventing unnecessary consumption during low-demand periods.
Reverse Osmosis Water System
Reverse osmosis systems desalinate seawater to provide a continuous source of fresh water. By reducing reliance on freshwater at ports, this system supports water conservation and ensures a more self-sufficient water supply.
Selective Catalytic Reduction
Selective catalytic reduction mixes the engine’s exhaust gas with a reducing agent in the presence of a catalyst to break down harmful nitrogen oxide (NOx) emissions into safe compounds. This significantly reduces Nox emissions, an indirect greenhouse gas, contributing to cleaner air and a healthier environment.
Shore-Side Electricity Capability
The Sylvia Earle and the Douglas Mawson are fitted with technology that can connect to shore-based power while in port. This significantly reduces fuel consumption and allows them to harness renewable energy where it is available through the local grid. The challenge remains that many of the remote ports we visit are not yet equipped to support this technology. We continue to advocate for its wider adoption and hope to see more opportunities to utilise shore-side electricity in the destinations we visit.
Trim Optimisation Software
Trim is the balance of a ship between the bow and stern, determined by how weight is distributed. Our vessels use a loading computer with a detailed 3D geometrical model to calculate and manage stability. Trim optimisation software adjusts the ship’s balance to reduce resistance in the water and improve fuel efficiency.
Ulstein X-BOW®
The inverted X-Bow splits waves with more stability, allowing the vessel to maintain speed and absorb wave forces evenly. By reducing impact, slamming and wave-induced vibrations, the X-Bow helps improve energy efficiency, lower speed loss and acceleration levels, and reduce fuel consumption and atmospheric emissions.
Virtual Anchoring
Virtual anchoring allows ships to hold position on the water without deploying a physical anchor, protecting delicate and ecologically important seabeds. This system requires two diesel generators to operate, so in certain locations we still use a physical anchor where the seabed is made up of mostly rock or sand. Our team carefully balances environmental impact and fuel efficiency to determine the most responsible anchoring method for each location.
Water Refill Station
Our water refill stations allow passengers and crew to use refillable aluminium bottles throughout expeditions and once returning home, eliminating the need for single-use bottles.