ENDURANCE OF SEACAT
SeaCat MK1 Approx. 10 h autonomy
SeaCat MK1 ER
(An additional battery section can be attached to the AUV in order to double the endurance)
Approx. 20 h autonomy
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    Survey Head ONE
    Survey Head ONE

    Bathymetric images paired with high resolution videos

     

     

     

    Video
    Gallery
    • Survey sample of an underwater pipeline 1/2
    • Survey sample of an underwater pipeline 2/2
    • Survey result of bathymetric seabed mapping 1/2
    • Survey result of bathymetric seabed mapping 2/2
     
    Further Information

    The SeaCat’s Survey Head ONE features a NORBIT multi-beam echo sounder for high resolution bathymetric surveys.

    • with approx. 40W power consumption, the system is suitable to operate from battery
    • NORBIT’s wideband multi-beam technology facilitates long range real-time data collection and at the same time achieves high resolution data
    • the sonars are based on a state-of-the-art analogue and digital platform featuring powerful signal processing capabilities, offering roll stabilized bathymetry and several imagery and backscatter output
    • ATLAS IP Camera, specifically built for deep water operations that combine HD-quality video with great light sensitivity
    Details
    Feature Specification
    Frequency 200 to 400 kHz
    Bandwidth

    80 kHz, all frequencies

    Beam width

    0.9° x 0.9° at 400 kHz

    Swath sector

    7° to 210°

    System range

    > 100 m

    Ping rate

    max. 50 Hz

    Range resolution

    < 10 mm (acoustic)

    Number of beams

    256 – 512 EA &ED

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    Survey Head TWO
    Survey Head TWO

    Hydrographic surveys according to highest standards

    Full bathymetry measurements with the installed R2Sonic 2022 broadband/wideband multi-beam echo sounder

    Video
    Gallery
    • 160° beam width allow mapping of vertical structures and seabed in harbour areas (image courtesy of R2Sonic)
    • 160° beam width allow mapping of vertical structures and seabed in harbour areas (image courtesy of R2Sonic)
     
    Further Information

    Sonic Systems generate reliable and remarkably clean data with maximum user flexibility through all range settings.

    The 60 kHz signal bandwidth offers twice the resolution of any other commercial sonar in both data accuracy and imagery.

    With over 20 selectable operating frequencies to choose from within the 200 to 400 kHz band, the user can trade off resolution and range and effectively control interference from other active acoustic systems.

    In addition to selectable operating frequencies, Sonic systems provide variable swath coverage selections from 10° to 160° on the fly.

    Details
    Feature Specification
    Frequency 200 to 400 kHz
    Bandwidth 60 kHz, all frequencies
    Beam width 1°x1° at 400 kHz
    Swath sector 10° to 160°
    System range 500 m
    Ping rate max. 60 Hz
    Range resolution 1.25cm, all frequencies
    Pulse length 15 to 500
    Number of beams 256
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    Survey Head FOUR
    Survey Head FOUR

    Combining the strengths of the Survey and Subbottom Head allows for detailed tracking and exploring of underwater structures and seabed profiles

    Video
    Gallery
    • Sample data which has been recorded in a harbour. The green line represents the vehicle
    • Exemplary data taken by SeaCat showing HF data (top) and LF data (bottom)
    • Exemplary results of the NORBIT Wide Band Multi-beam System
     
    Further Information

    The Survey Head FOUR is equipped with a Multi-beam echo sounder, a subbottom profiler and a rotatable camera. It offers a full sensor suite for advanced survey tasks.

    The system consists of:

    • A NORBIT Wide Band Multi-beam System (WBMS) - a compact high resolution wide-swath multi-beam sonar
    • An ATLAS IP Camera, specifically built for deep water operation, that combines high resolution HD video with great light sensitivity.
    • A Tritech Parametric Sub-Bottom Profiler that allows for a raw 200kHz seabed profile, as well as 20kHz subbottom layers produced by the parametric pulse.
    • A connecting port for the G 882 Marine Magnetometer of Geometrics
    • The additional sensor can be towed behind the AUV and completes the subbottom survey capabilities of this advanced SwapHead
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    Inspection Head
    Inspection Head

    The Inspection Head is the ultimate tool for manual inspection of objects and real-time data transmission for immediate point-of-interest inspection

    It comprises a forward-looking multi-beam and a Pan/Tilt Camera Unit

    Video
    Gallery
    • Result of the forward-looking multi-beam sonar
    • Result of the video camera
      Both results can be displayed on any laptop connected to the SeaCats network.
     
    Further Information

    The SeaCat is a hybrid AUV, which means it is capable of operating in a pre-programmed (AUV) mode or in a fully remotely controlled (ROV) mode. Through these properties, SeaCat does not only fulfil the requirements for large-area detection but also for point-of-interest inspection.

    Today's ROVs consist of an open frame where several instruments may be attached. The weight of these is compensated for by an amount of buoyancy foam on top of the ROV. For SeaCat, the Inspection Head shall resemble this strategy.

    The Inspection Head is the ultimate tool for manual inspection of objects and the transmission of realtime data. It comprises a forward-looking multi-beam sonar with a vertical angle of 20° and a lateral field of view of 120°. Additionally, it features a Pan/Tilt Unit with a light source and a video camera, enabling the user to point at the object of interest. The data of camera and sonar can be displayed on any Laptop connected to the AUV network.

    Details
    Feature Specification
    Frequency 720 kHz
    Angular resolution 1.0° acoustic, 0.5° effective
    Scanning sector 120°
    Number of beams 256
    Depth rating 300 m
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    Water Quality Head
    Water Quality Head

    Extended environmental monitoring by measuring distribution of chemical/organic matters

    Video
    Gallery
    • Physical and bio-optical isosurfaces within a volume through a frontal zone on the northern Monterey Bay shelf
    • Temperature and chlorophyll fluorescence at 11 m deep for the volume survey shown above
    • The four sensors and sensor groups the Water Quality Head consists of
    • Two of the integrated sensors:
      CTD (on the top)
      enviroFlu-HC (at the bottom)
     
    Further Information

    In order to enforce standards for the protection of coastal sea areas and water resources, the Water Quality Head contributes significantly to the monitoring of health status and water quality.

    Another, highly useful application of SeaCat’s Water Quality Head is the determination of current sonar conditions and water layers. This information may be crucial for the optimised deployment of e.g. mobile diver detection sonar systems.

    The Water Quality Head’s sensor suite has been configured by ATLAS ELEKTRONIK GmbH’s experts and mainly consists of the four sensors or sensor groups, respectively, as listed below:

    Details
    Type Measured Parametre(s) Manufacturer
    CTD 90






     
    1. PH
    2. Conductivity
    3. Salinity
    4. Dissolved oxygen
    5. Temperature
    6. Pressure
    7. Turbidity
    8. Chlorophyll
    Sea and Sun






     
    enviroFlu-HC Hydrocarbons in water TriOS
    microFlu-CDOM CDOM (Coloured Dissolved Organic
    Matter)
    TriOS
    Ramses Photosynthetically active radiation (PAR),
    irradiance
    TriOS
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    Tunnel Inspection Head
    Tunnel Inspection Head

    Have a look into the inside of water supply ducts

    For the inspection of fresh-water pipelines, the Tunnel Inspection Head is equipped with five cameras, enabling a 360° view and an optimised LED lighting arrangement

    Video
    Gallery
    • Results of the video camera
    • Results of the video camera
    • Results of the video camera
    • SeaCat whilst being lowered into the inflow basin

     
    Further Information

    In its present configuration, the Tunnel Inspection Head is able to inspect the internal conditions of a 24 km long fresh-water pipeline without access and touching the walls in order to prevent possible water pollution.

    •  Fully autonomous operation without mission plan

    - The package consists of dedicated guidance software developed by ATLAS ELEKTRONIK GmbH, which makes use of the vehicle’s navigation system as well as further guidance sensors

    - During the mission, the SeaCat’s heading, course and speed is controlled by this guidance software via its backseat driver interface (see chapter Custom Head).

    - For turbid waters, a modification of the main sensor regarding the sonar system is conceptually available.

    Details
    Feature Specification
    WVGA 752 x 480 @ 60 frames per second
    Low-light camera from 0.5 lux
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    Harbour Inspection Head
    Harbour Inspection Head

    High technology enables the inspection of quays, berths and other underwater structures

    Fully rotating Sensor Suite which includes 3D video camera and high frequency multi-beam echo sounder

    Video
    Gallery
    • The Harbour Inspection Head turns the sonar and camera automatically into an ideal position for ship hull and harbour wall inspections.
    • The Harbour Inspection Head turns the sonar and camera automatically into an ideal position for ship hull and harbour wall inspections.
    • SeaCat can be used for offshore windfarm inspections
     
    Further Information

    The Harbour Inspection Head was especially designed for the inspection of man-made underwater infrastructure and ship hulls.

    1. It features a fully rotating sensor suite which includes a 3D video camera and a high-frequency multi-beam echo sounder.
    2. At a frequency of 2.25 MHz, the integrated BlueView MB2250-45 delivers high-resolution 3D bathymetry images.
    3. Supported by the mission planning, the Harbour Inspection Head enables the SeaCat to scan a pre-defined section of a harbour wall or an underwater structure.
    4. The rotating section of this SwapHead moves according to a profile defined in the mission plan. Alternatively, the SwapHeadTM features automatic sensor positioning.

    Camera and sonar are working simultaneously and – after post-processing of the raw data – provide the user with a resulting 3D picture created by the dedicated Post Mission Analysis Software Suite (as described in Product Description Part 3 – Support Set).

    Details
    Feature Specification
    Field of view 45° x 1°
    Max. range 30 ft
    Beam width 1° x 1°
    Number of beams 256
    Beam spacing 0.18°
    Time resolution 0.010 m (0.39 in.)
    Max. update rate 40 Hz
    Frequency 2.25 MHz
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    Geo Magnetic Head
    Geo Magnetic Head

    Detecting metal buried in the sediment

    Possibility of towing equipment behind the SeaCat by attaching the tow cable to the strain-relief of the fibre-optic cable

    Video
    Gallery
    • The picture shows a sample data which has been recorded in the harbour of Olpenitz in the Baltic Sea.
    • The picture shows the SeaCat with Geo Magnetic Head before launch.
    • The path of the vehicle is shown as light green line; the data has been overlaid to a satellite image of the area.
    • It is clearly visible that the concrete dock structure increases the magnetic intensity in shape of a distributed noise. In contrast, there is a strong magnetic contact close to the end of the survey.
    • The picture shows The SeaCat on a Geo Magnetic survey.
     
    Further Information

    The Geo Magnetic Head comes as a complete set, consisting of a SwapHead with cable intake, a towed magnetometer and a cable guidance system.

    The G-882 Marine Magnetometer is particularly well suited for the detection and mapping of all sizes of ferrous objects.

    These include:

    • anchors,
    • chains,
    • cables,
    • pipelines,
    • ballast stones
    • other scattered shipwreck debris,
    • munitions of all sizes (UXO),
    • aircrafts,
    • engines and any other object with magnetic expression.

     

    Objects as small as a 5-inch-screwdriver are readily detected, provided that the sensor is close to the seafloor and within practical detection range.

    The typical detection ranges for common objects are as follows:
    Ship 1000 tons 0.5 to 1 nT at 800 ft (244 m) 1000 lb bomb 1 to 5 nT at 100 ft (30 m)
    Anchor 20 tons 0.8 to 1.25 nT at 400 ft (120 m) 500 lb bomb 0.5 to 5 nT at 50 ft (16 m )
    Automobile 1 to 2 nT at 100 ft (30 m) Grenade 0.5 to 2 nT at 10 ft (3 m )
    Light aircraft 1 to 2 nT at 100 ft (30 m) 20 mm shell 0.5 to 2 nT at 5 ft (1.8 m)
    Pipeline (12''”) 1 to 2 nT at 200 ft (60 m) Screwdriver (5”'') 0.5 to 2 nT at 12 ft (4 m)
    Pipeline (6”'') 1 to 2 nT at 100 ft (30 m ) 10 lbs of iron 0.5 to 1 nT at 20 ft (6 m)
    100 kg of iron 1 to 2 nT at 50 ft (15 m) 1 lb of iron 0.5 to 1 nT at 10 ft (3 m)
    100 lbs of iron 0.5 to 1 nT at 30 ft (9 m)    
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    Subbottom Head
    Subbottom Head

    The acoustic view into the sediment helps during archaeological, geological and military tasks
     

    Video
    Gallery
    • Exemplary data taken by SeaCat showing HF data (top) and LF data (bottom)
    • Image of the Subbottom Profiler (SBP)
    • Subbottom Head while launching
     
    Further Information

    The Subbottom Head features a Tritech dual-frequency Seaking Parametric SBP (Subbottom Profiler) that emits a 20 kHz pulse using a primary frequency of 200 kHz.

    • The profiler emits the sound vertically downward towards the seafloor and receives the return of the sound once it has been reflected.
    • Parts of the sound will penetrate the seafloor and thus be reflected by the different subbottom layers and embedded objects.
    • The data obtained by using the Subbottom Head provides information on the different sub-floor sediment layers.

    For a quick visualisation of the mission results, the package includes dedicated Tritech Seanet Pro Software.

    Details:
    Feature Specification
    Primary frequency 200 kHz
    Primary beam width 4 degrees
    Low frequency 20 kHz
    Low frequency beam width 4.5 degrees
    Pulse length 100 seconds
    Range resolution HF depends on range scale
    (10 - 100mm)
    Range resolution LF depends on range scale
    (60 seconds @ 30 m)
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    Custom Head
    Custom Head

    If none of the currently available SwapHeads meet your specific requirements, there are many options for matching your needs.

    Video
    Gallery
    • Example of a customer-specific configuration: Video Inspection Head.
    • Picture of the prototype
     
    Further Information

    1) ATLAS is ready to build a new head according to the customer's specifications. A team of specialists will select sensors or actors and design the custom head in close cooperation with the client.

    2) If wanted, the customer can be empowered to develop a payload head on his own and full responsibility. For this purpose a detailed interface control document will be supplied, describing all necessary mechanical and electrical interfaces. A licence will be issued which authorises the use of customer build equipment. A typical head consists of sensors (or actors) and a small control- and data storage / processing unit which can be accessed via Ethernet.

    The highest level of customization is possible through a mechanism, generally known as "backseatdriver interface". Basically, the backseat driver concept enables the communication between the SeaCat Guidance Computer and a customer-owned payload computer. Software, running on the payload computer, may issue a command containing course, heading and speed in regular intervals. Upon reception of this command, the current mode of operation (automatic or manual) is overridden and SeaCat behaves as commanded by the payload. To use this behaviour a Software upgrade will be delivered together with a dedicated Software interface description.

    To support own developments, a plain GRP (Glass-Reinforced Plastics) bow shell can be supplied for integrating specific payloads. SeaCat's Custom Head is available in various sizes. The customer must take care that the integrated head is neutrally buoyant

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    Control Set
    Control Set

    The Control Set provides SeaCat with the capability to operate in autonomous (AUV) or remotely controlled (ROV) mode

     

    Video
    Gallery
    • Mobile Control Unit with Interface Box and antennas on tripod
     
    Further Information

    The Control Set consists of three main components:

    • Mobile Control Unit (MCU) as main user interface
    • Interface Box (IF Box) for connecting the MCU to SeaCat’s MultiCom System
    • Antenna rack for mounting the various communication systems

    SeaCat’s Mobile Control Unit (MCU) is based on a ruggedised notebook and allows not only for mission planning, but also for subsequent post-mission analysis.

    Details
    Feature Specification
    Climate Conditions

    Operable from -20°C up to 60°C

    Up to 95% humidity

    MCU's Chassis

    Magnesium alloy IP65 certified

    Fully shock- and vibration-protected

    Display

    15.6 inch multi-touch display

    Effortlessly readable under sunlight

    Software Systems

    Field-tested ATLAS ELEKTRONIK GmbH-developed SeaCat planning software

    ECDIS chart server

    Discover sidescan visualisation software

    SeaNet Pro for displaying scanning sonar data

    Interface Box (IF)

    Connects the antennas and the SeaCat vehicle to the MCU for communication and data transmission purposes:

    • ports for an Iridium antenna
    • the acoustic underwater modem
    • two GPS antennas to display a ship-centred map on the Mobile Control Unit
    • fibre-optic datalink

    The vehicle itself is connected to the IF Box via WIFI or a fibre-optic link. These links serve as the central means of communication between the MCU or an operator’s console.

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    Modem Base Station
    Modem Base Station

    The Modem Base Station enables the acoustic underwater communication in a range of up to 2 km, depending on the current environmental conditions

     

     
    Further Information

    The Modem Base Station is connected to the Interface Box (IF Box) which is part of the SeaCat Control Set. 

    • used to transmit position data of the SeaCat which is needed for tracking the vehicle
    • It also recognises a stop command or other re-planning signals from the surface station in order to interrupt an on-going mission.
    • The link is realised by a Evologics S2C 18/34– a powerful and reliable underwater communication system designed to meet the requirements of research and exploration and is proven in various subsea communication projects.

    The Modem Base Station can be integrated in various ways: A locally flexible application by simply hanging the system overboard or from a harbour is just as possible as a full integration into the ship system.

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    Remote Control Unit
    Remote Control Unit

    Optimised for remotely steering the SeaCat at the surface

    Video
    Gallery
    • Front view
    • Top view
     
    Further Information

    ATLAS ELEKTRONIK GmbH’s device of choice – Hetronic’s remote transmitter NOVA-M – has an ergonomically designed housing which is small and sturdy, but at the same time optimised for operations with gloves.

    Details
    Feature Specification
    Weight 449 g
    Height  235 mm
    Width 160 mm
    Depth  95 mm
    IP65 Certification 

    Full protection against a multitude of environmental impacts

    Frequency The RCU connects to the control set via radio frequency
    Max. distance RCU - Control Set 100 m

     

     

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    PMA Suite
    PMA Suite

    Processing and visualising of the data collected is realised by using commercial-off-the-shelf mission evaluation packages

     

     
    Further Information

    SeaCat’s PMA Suite contains two dedicated tools that are highly recommended by ATLAS ELEKTRONIK GmbH: QINSy for advanced post-processing of sensor data and Fledermaus for 4D geo-spatial processing and analysis.

    QINSy

    QINSy is an integrated navigation system software package that is extensively and globally used for acquiring and processing multi-beam data. A variant of this software is already implemented into SeaCat’s data collection process.

    Key Features:

    • real-time qualification of the raw data and on-the-fly correcting for offsets, motion, sound velocity refraction and height, to produce “final” xyz soundings as the survey proceeds
    • provides real-time data acquisition, full survey planning, data cleaning/validation and map plotting functionality
    • easily customised with add-on modules like the MBES (multi-beam echo sounder) and SSS (sidescan sonar) modules, or the Remote Display Client (RDC) add-on which allows dongle-free remote QINSy displays to be used on computers connected to the main QINSy survey computer
    • QPS’s QINSy Survey Package included:
      • able to interface up to 256 sensor systems & ideal for larger survey operations
      • used for all types of off-shore activities like anchor handling, pipe-lay operations, tug management and, of course, ROV and AUV surveys

    Fledermaus

    Fledermaus as the industry-leading interactive 4D geo-spatial processing and analysis tool is also part of the PMA Suite

    Additionally  the  fully integrated time reference allows users to work in a true space and time environment

    Key Features:

    • display of data that has been collected by the multi-beam echo sounder and post-processed with QINSy as a 3D-Modell (bathymetry model)
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    Capture System
    Capture System

    The handling system can be adapted to the user's needs and offers possibilities ranging from manual launch using a slip-trolley to a crane-based launcher usable at higher sea states

    Video
    Gallery
    • Quick release shackle prepared for launching and recovery process
    • Launching the SeaCat 1/2
    • Launching the SeaCat 2/2
     
    Further Information

    Launching process

    An on-board crane with a safe working load of 1000 kg or more can be used for operations without further installations.

    Launching the vehicle by using a snap shackle is a straightforward method.

     

    Recovery process

    The main part of L&R operations is the recovery lug of SeaCat. The vehicle features an open face with a pawl that makes it very easy to catch the SeaCat by means of a sling:

    → This is attached to a self-locking crane hook (shackle), the other end is held by the berthing crew.

    → When the crane swings out to e.g. 5 m off board, this ropes forms a loop which swims on the water surface.

    → By steering the SeaCat across the rope, its recovery lug will catch the line.

    → The rope is then used to pull the crane hook into the lug.

    → The automatic closing of the crane hook establishes a resilient connection and the SeaCat is ready to be lifted.

    Components:

    • The patented quick release shackle made of stainless non-magnetic steel, that can easily be attached to existing cranes by using simple heavy-load slings to connect the shackle to the crane hook (DNVGL approved)
    • A balanced capture rope
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    FOC System
    FOC System

    The fibre-optic cable (FOC) system can be attached to the vehicle and thus establish an Ethernet data connection for real-time data transfer
     

    Video
    Gallery
    • Example of SeaCat with fibre-optic cable
    • Example of SeaCat with fibre-optic cable
     
    Further Information

    The FOC system provides an operational radius of approx. 700 m by means of a cable of 1000 m length and is especially recommended for use in combination with the Inspection Head.

    In this configuration, it will serve for the transfer of video and sonar data in real time and for controlling the pan/tilt unit.

    Package

    • 1000 m fibre-optic cable with a diameter of 1.6 mm, delivered on an especially developed drum
    • Prop Guard (Propeller Guard) prevents the fibre-optic cable from being sucked into the propeller and simultaneously provides a strain relief for the connector.

     

    Details
    Feature Specification
    Tensile load during operation max. 250 N
    Breaking tensile load min. 500 N
    Min. bending radius 20 mm
    Trim positive (buoyant)
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    SeaCat Trolley
    SeaCat Trolley

    The SeaCat Trolley combines several advantages for the transportation of AUVs in sand, meadow, harbour slipways and other bumpy grounds

    Video
    Gallery
    • SeaCat ready for transport
    • Easy transportation with the SeaCat Trolley
     
    Further Information

    The SeaCat Trolley has been developed in cooperation with a sub-supplier who contributed his vast experience gained in decades of developing water scooter transport wagons.

    It provides shock absorption and good manoeuvrability with lashing possibilities for easy transportation. The integrated winch system supports the operator when recovering the SeaCat onto the trolley.

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    Tool Box
    Tool Box

    The tool box includes all that is needed for comprehensive in-field service on the complete SeaCat system

    The numerous tools range from double open-end wrenches to a set of feeler gauges and will be delivered with a dedicated tool case

    Video
    Gallery
    • Closed Tool Box for handy transportation
    • Numerous tools
     
    Further Information

    No further information available

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    STTE Suite
    STTE Suite

    The Special Tools and Test Equipment Suite provides the customer with tools required for maintenance of the SeaCat system

    Video
    Gallery
    • Handy boxes for easy transportation
    • Tools included in the STTE Suite
     
    Further Information

    The package includes: 

    Propeller detaching device
    Air insufflation unit
    Switch-off magnet
    FOC maintenance set
    Infrared thermometer: to check if the environmental conditions for storage and operation are within
    the limits.
    Pressure regulator N2
    Density meter and trimming chart: to measure salinity as basic data for trimming
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    Work Bench
    Work Bench

    The work bench is highly recommended during SeaCat's in-depth maintenance when the vehicle has to be opened, a procedure that is regularly foreseen during annual inspection

    Video
    Gallery
    • Picture of the Work Bench designed by ATLAS ELEKTRONIK
    • Picture of the Work Bench designed by ATLAS ELEKTRONIK
    • Picture of the Work Bench designed by ATLAS ELEKTRONIK
     
    Further Information

    The work bench was designed to uniformly carry all individual sections of the SeaCat in its dismantled stage and supports the alignment of the sections for re-assembly by means of a rail system.

    It is equipped with storage containers for tools and auxiliary materials such as small spare parts, screws or cable straps.

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    Command Container
    Command Container

    The Command & Control Unit is a highly flexible approach aiming for the successful realisation of individual mobile applications.

    Video
    Gallery
    • 3D picture of Container with SeaCat, Work Bench and Trolley
    • Container on ATLAS test ground
     
    Further Information

    This containerised solution allows for full support of all types of SeaCat missions. It comprises storage facilities for the SeaCat vehicle and the corresponding tools as well as temporary work places (Mobile Control Unit MCU) and the charging station. Depending on the planned application, the Command & Control Unit;s configuration can be adapted to specific customer requirements. For example, one of the already realised variants features a cranebased launch and recovery system.