Authorized Alamarin-Jet distributor in Taiwan
Alamarin-Jet Waterjets
Waterjets and control systems from Finland. Hallmark Marine provides application review, installation guidance and sea trials, scheduled maintenance and repair, and genuine spare parts supply.
About
About the brand
Founded in Finland in 1976, Alamarin-Jet now focuses on marine waterjets and control systems. According to the manufacturer, more than 90% of its products are made in Finland, with the remainder made in the EU. Maximum input power ratings run from 100 kW for the AJ 160 to 1,500 kW for the Omega 42, with applications from yacht tenders and SOLAS fast rescue craft to patrol boats, fireboats, pilot boats and passenger vessels. The patented Combi-Frame of the AJ 245/AJ 285 and the patented Dual Angle Shaft of the Omega series offer different installation options, while the Sigma drive-by-wire system offers optional joystick docking, position-hold and virtual-anchor functions, subject to configuration. In 2024, the company also announced joint development of its Delta DP dynamic positioning system with the Finnish Border Guard.
Unmanned Surface Vehicles
Propulsion for Unmanned Surface Vehicles (USVs)
With no exposed propeller, waterjets suit shallow-water operation and respond quickly, and they can be integrated with electronic control systems. In February 2025 the manufacturer reported supplying propulsion and control systems for more than 100 USVs worldwide over the previous year.
USV-ready interface
The EXIF interface of the Sigma Control System provides a CAN bus jet-control interface, including engine management, for commands from third-party autonomy systems.
Control integration on small USVs
AJ 160 and AJ 180/185 come standard with the ACU controller, which accepts an external analogue signal (typically 0–5 V) or NMEA 2000 CAN rudder messages; each ACU controls one actuator.
Redundancy
In the Sigma Control System, each jet is an individual bus node, and twin installations use two electrically separated primary bus lines.
External autopilot support
Sigma provides an interface for third-party autopilots; the optional Intelligent Dynamics package offers heading hold, course and track modes (track mode requires an external navigation planner).
Omega Series
Omega Series | Max. input 810–1,500 kW
High-power commercial, government and passenger vessels.
Omega 42
Max. input 1,500 kWPatrol boats, fast workboats, landing craft
Omega 37
Max. input 1,000 kWCommercial craft, government vessels, passenger ferries, yachts
Omega 33
Max. input 810 kWDemanding commercial and military vessels
AJ Series
AJ Series | Max. input 100–550 kW
From yacht tenders and rescue boats to workboats and USVs.
AJ 340
Max. input 550 kWLarge fast craft, commercial vessels, leisure boats
AJ 285
Max. input 368 kWWorkboats, pilot boats, fast craft, USVs
AJ 245
Max. input 235 kWFast rescue boats, SAR boats, work tenders (manufacturer's case studies)
AJ 230
Max. input 190 kWSOLAS fast rescue boats, workboats
AJ 180/185
Max. input 110/120 kWYacht tenders, small commercial craft, USVs
AJ 160
Max. input 100 kWYacht tenders, small commercial craft, USVs
Compare
Model comparison
Omega 42Omega1,500 kW2,040 hp2,300 rpmØ480 mm880 kg
Omega 37Omega1,000 kW1,360 hp2,550 rpmØ430 mm750–770 kgOmega 33Omega810 kW1,100 hp2,700 rpmØ385 mm550–600 kg
AJ 340AJ550 kW750 hp3,300 rpmØ335 mm272 kg
AJ 285AJ368 kW500 hp3,700 rpmØ288 mm181 kg
AJ 245AJ235 kW320 hp4,600 rpmØ245 mm105 kg
AJ 230AJ190 kW260 hp4,600 rpmØ228 mm81 kg
AJ 180/185AJ110/120 kW150/163 hp5,000 rpmØ192/197 mm48/50 kg
AJ 160AJ100 kW136 hp5,000 rpmØ186 mm38 kgBars show each model's max. input power; figures are max. impeller shaft speed, max. impeller diameter and dry weight. Select a model for full specifications.
Control Systems
Control systems
Three solutions, selected according to propulsion configuration and handling requirements.
Sigma Control System
Sigma Control systems
Alamarin-Jet's main control system, introduced in 2019. It is drive-by-wire: helm commands travel as electronic signals, and the steering nozzles and reversing buckets are moved hydraulically. Its modular architecture controls one to four waterjets and supports multiple control stations.
Compatible models:Omega 42Omega 37Omega 33AJ 340AJ 285AJ 245
Drive-by-wire, plug and play
Factory-made modular cabling is plug and play; each waterjet is an independent node on the CAN bus, and engine throttle is controlled directly via digital CAN.
Touchscreen + physical keys
Updated in 2024 with a 7-inch touchscreen and 10 physical keys beside it, so the system can still be operated in rough seas when touch input is difficult.
Redundancy
Twin and multi-jet configurations have two galvanically isolated main buses, and each axis of the control levers and joystick has isolated dual outputs.
Joystick, position hold, virtual anchor
Joystick control for berthing and low-speed manoeuvring in port; position hold using GNSS position and heading (single-jet installations need a bow thruster); virtual anchor keeps the vessel within a set radius with the bow into the wind.
Autopilot
Heading hold, Course Mode (holding the course line), and Track Mode following a route from an external planning system such as ECDIS; external autopilots can also be connected.
EXIF external interface (USV Ready)
A complete CAN bus waterjet control interface, including engine management, through which third-party autonomous systems can issue control commands. USV propulsion solutions →
Joystick, position hold, virtual anchor and autopilot are AJ Intelligent Dynamics add-on functions, available depending on vessel configuration; position hold in rough weather requires higher shaft speed and uses more fuel. Availability and integration of the EXIF and external autopilot interfaces depend on the selected modules and the project configuration.
Delta DP
Delta DP dynamic positioning system
A modular, high-level propulsion control system introduced in 2024 that integrates the vessel's propulsion, steering and navigation systems. It can control propulsion units, bow thrusters and rudders, suits workboats and yachts under 24 m, and can be fitted to newbuilds or retrofitted to existing vessels.
Three control modes: Manual controlDynamic positioning (DP)Autopilot
Dynamic positioning and virtual anchor
Using data from GPS, compass and wind sensor, it automatically controls the propulsion units and bow thrusters to hold the vessel on station; the virtual anchor maintains position without dropping anchor.
3-axis joystick force control
A single joystick controls thrust fore-aft, sideways and in rotation, making berthing and low-speed manoeuvring easier.
Autopilot
Heading keeping, course-over-ground (COG) keeping and track following, plus an external waypoint autopilot interface for NMEA 2000 or NMEA 0183 autopilot computers.
Modular CAN architecture
Modules are linked by the manufacturer's proprietary, J1939-inspired CAN network; each thruster has its own real-time control module, with a 7-inch display and an NMEA 2000 interface for GPS and external autopilot.
Control options
The helm can be fitted with twin throttle levers, a 3-axis joystick or E-Helm, with a mode selector to switch between manual, DP and autopilot.
Engine, gearbox and rudder integration
Engines can be controlled by opto-isolated analogue signal or J1939 CAN, gearboxes by solenoid control, with a ZF ClearCommand DP-interface option; rudders support on/off (bang-bang) or PWM proportional-valve control, and bow thrusters analogue signal or PWM proportional valves.
Sigma controls waterjets; Delta DP can additionally integrate rudders and bow thrusters — choose according to the propulsion configuration. Equipment and functions that can be integrated are confirmed per vessel configuration and project.
Actuator Control Unit
ACU actuator control unit
A modular propulsion control system built from a simple selection of modular components. Each ACU controls one actuator — reverse-deflector operation, nozzle steering, engine throttle or gearbox engagement. Standard on the AJ 160 and AJ 180/185.
- Three inputs: internal potentiometer, external analogue signal (typically 0–5 V) or NMEA 2000 CAN rudder message
- 12/24 V supply with reverse-polarity protection; IP67, operating temperature −40 to 65 °C
- Configured with the built-in button and traffic-light LEDs, or an optional service tool; 155 × 150 × 35 mm
- Typical set-ups: ACU-MD for deflector control and ACU-ES for steering, with mechanical cable, electronic lever or electronic wheel input
Catalogue
Catalogue downloads
Alamarin-Jet 2026 Product Range (Chinese edition)
A Chinese edition is in preparation and will be available for download when complete.
Alamarin-Jet 2026 Product Range (original English edition)
Manufacturer's catalogue PDF, 16 pages, approx. 8.6 MB.
Download catalogue PDF →Equipment selection, installation guidance and sea trials, scheduled maintenance and repair, and genuine parts. For parts enquiries, please provide the brand, model, waterjet serial number and vessel name. Warranty follows the manufacturer's terms and is decided case by case.