EMAPS Capabilities & Features

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EMAPS Capabilities & Features
Low Drag Side HullsStacking PointsSide Hull Retraction SystemPower and Data CablesBattery HatchesComms & Sensor MastCamerasData Radio, Weather Station, GPS, AIS and other Sensors & Comms EquipmentModular Payload CassetteSolar PanelsWing SailsAutonomyBow CompartmentPropulsion Pods & RuddersSail Retraction and Rotation

Low Drag Side Hulls

  • AMA’s: Ama is the Pacific Islander term for outrigger hulls. EMAPS Ama’s offer significant stability and shallow draft in a relatively small (5.85m) boat.
  • 6kWh LiFePO4 Batteries: the side hulls (Ama’s) of EMAPS each house a battery bank comprised of 8 batteries each, providing 24.6kWh of power storage to EMAPS systems and payloads. The batteries’ LiFePO4 chemistry provides exceptional safety compared to other lithium-ion chemistries, ensuring that neither EMAPS, nor its payloads are ever at risk.

Stacking Points

Stacking hardpoints: are located on the top and bottom of each corner of the centre hull to enable the stacking of multiple EMAPS vessels and to guide the boat on its’ cradle during launch and recovery, and also to ensure EMAPS sits securely on its’ cradle during transport and storage.

Side Hull Retraction System

  • AMA Retraction System Features: The Ama (side hulls) retraction system is a novel design, developed expressly to enable the EMAPS design. The retraction system folds into the side of the boat after the vessel is recovered to its’ cradle and trailer and in order to stow the boat for road transport.
  • AMA Retraction System Functionality: The ability to retract the EMAPS side hulls allows a 4.6m wide boat to be towed on a commercial trailer without wide load restrictions. Additionally, the retracted dimensions of the Ama’s allow storage and shipping in a 20’ ISO container without dis-assembling the boat.

Power and Data Cables

Cable Runs: Power and Data Cables are run from the bow electronics compartment through the technical gallery (port and starboard sides of the centre pod). Cables run to equipment in the technical gallery, port and starboard side hulls and the mast

Battery Hatches

Ama Hatches: Hatches are located on the amas, bow, and payloads to allow access to critical onboard equipment for easy inspection and maintenance. These hatches are designed to ensure protection against flooding and damage to electrical components. Drains are fitted in sail retraction gear wells to eliminate collection of water.

Comms & Sensor Mast

Mast & Stays: The 4.5 metre carbon-fibre mast houses a suite of communications systems and sensors, with extra space for payload systems. The mast is completely detachable for storage and transportation and is stabilised by twin stays attached to the centre-pod of EMAPS when mounted. A secondary mast can be fitted to hold larger electronic equipment such as navigation radar and satellite communications antenna.


High Resolution Cameras: The eyes of EMAPS, four high-resolution cameras with overlapping fields of view provide 360 degrees of visible-light, infra-red, and active stereo capability, ensuring that EMAPS is fully aware of its surroundings in any light conditions. There are four cameras on the mast to provide surveillance and situational awareness and one camera on the bow of EMAPS to facilitate near-water-level collision avoidance.

Data Radio, Weather Station, GPS, AIS and other Sensors & Comms Equipment

  • Silvus Data Radio: EMAPS integrates a cutting-edge communications system in the Silvus Technologies StreamCaster Lite data radio, employing COFDM, MIMO, and MANET technologies to create high-throughput, robust communication connections between EMAPS, operators, and other manned and unmanned systems.
  • AIS: The AIS antenna allows EMAPS to share and receive essential vessel identification and movement information with other maritime vessels, including vessel identity, position, course , and speed.
  • GPS: The GPS on-board EMAPS provides 3 metre accurate commercial positioning capability, with the potential to host more advanced GPS technology for payloads where extreme accuracy is mission critical.

Modular Payload Cassette

Modular Payloads: EMAPS hosts payload mission packs in its modular payload cassette, which is integrated into the centre pod. Anything from water-sampling dippers, to a full launch and recovery system for a small UUV can be accommodated by this payload system. Payloads are powered from the vessel’s solar and battery system, allowing continual operation of electrical equipment off either 12, 24, or 48VDC power. Communication and data transfer between the payloads and the shore control is also facilitated by EMAPS’ onboard equipment.

Solar Panels

Safiery Solar Panels: 2780W of lightweight Safiery solar panels line surfaces of EMAPS’ deck, bow hatch and wing sails, providing up to 22kWh of power each day and together with the onboard batteries, ensuring that EMAPS is always online.

Wing Sails

Cruise Speed: Combining the capabilities of the sail, hydro-regeneration, and solar panel systems, EMAPS is able to cruise indefinitely at a speed of 5 to 8 knots depending on wind conditions.


  • Wired Connection for Debugging: Wired connections are available to interface with any EMAPS system directly via laptop, allowing for easy troubleshooting and system testing.
  • Nautilus Autonomy Controller: The brain of EMAPS, the Nautilus Autonomy Controller monitors internal systems, the surrounding environment, and manages mission objectives. State-of-the-art artificial intelligence software determines the optimal course of action in any situation, accounting for weather, power management, collision avoidance, and human safety in every decision.
  • MAST Maritime Autonomy Software Toolkit: Autonomy and mission management software developed in the USA, employed on USN Medium Displacement USV’s Ranger, Mariner, Sea Hawk, Sea Hunter is being ported to a low power platform for use in Small USVs such as EMAPS.
  • Remote Control Station: A remote-control station continuously manned by a single trained ASV operator is able to supervise up to 6 to 10 EMAPS vessels simultaneously depending on mission parameters. A team of ASV operators will guarantee supervision for the EMAPS fleet 24 hours a day, 7 days a week.

Bow Compartment

  • Wave Piercing Bow: The bow of EMAPS is designed to break the wave face when the momentum of the boat carries it into the upsloping face of oncoming waves.
  • Bow Electronics Compartment: EMAPS bow compartment hosts the battery management system, autonomy controller,
  • Battery Management System: A multilayered battery monitoring and protection system allows EMAPS’ advanced autonomy software to optimise battery management and power usage, guaranteeing that the twin battery banks never overheat and remain at full efficiency for as long as possible.
  • Shore Charging: While ashore, EMAPS’ battery banks can be charged using a standard 240V AC power connection, allowing EMAPS to be re-charged anywhere, anytime.
  • 12V/24V/48V DC Power: EMAPS’ power system provides 12V, 24V, and 48V DC power to payloads, allowing easy power supply for a wide variety of payloads, from powering small sensor suites to recharging AUVs and UAVs. Provision of multiple power formats allows the payload owner / operator to simplify the power supply for bespoke payloads.

Propulsion Pods & Rudders

  • Hydro Regeneration: Driving EMAPS are two 12kW Torqeedo propulsion pods equipped with hydro-regeneration capability. While the vessel is under sail, these pods generate electricity by allowing the passing water to rotate their propellers in reverse, transforming the wind energy captured by EMAPS’ sails into usable and storable power.
  • Rudders: EMAPS has one rudder per Ama, astern of the Torqeedo propulsion pods, designed to take advantage of the propellor wash to maximize steerage ability.
  • Sprint Speed: The formidable energy storage and power of EMAPS’ battery banks and propellers allows for a continuous sprint at an ultra-fast 17 knots for a full hour.

Sail Retraction and Rotation

  • Sail Folding Configurations: High-efficiency rigid sails are implemented into the EMAPS design. These tandem sails can be retracted and deployed to assist in storage, transport, and to lower the vessel’s centre of gravity in the event of extreme sea state conditions. The additional surface area that these create are covered with solar panels.
  • Sail Retraction Well Drains: The sail retraction and rotation gear wells are subject to water ingress which drains through the side of the centre pod.