Greensea Glossary

This is a auto-generated Article of all your definitions within the glossary.


This is a auto-generated Article of all your definitions within the glossary.


    Acoustic Communications

  • AHRS

    Attitude and Heading Reference System

  • ATR

    Automatic Target Recognition

  • AV

    Autonomous Vehicle

  • Beaufort

    Or Beaufort Scale is a scale for measuring wind speeds. The speed of the wind will affect wave action on the water.

  • BLOS

    Beyond Line of Sight

  • C2

    Command and Control

  • COG

    Course Over Ground the direction a vehicle is traveling relative to the bottom. This can be different than the vehicle Heading.


    Concept of Operations

  • CTD

    Conductivity, Temperature, and Depth Sensor

  • CTS

    Course to Steer. The heading (in True degrees) to steer to achieve the next waypoint.

  • DOF

    Degrees Of Freedom. The number of system parameters that may vary independently. Generally for systems we work with there are six: surge (moving forward/back), heave (moving up/down), sway (moving left/right), yaw (turning left/right), pitch (tilting forward/back), roll (tilting left/right).

  • DPC

    Dynamic Payload Control

  • DPD

    Diver Propulsion Device. A combat diving vehicle designed to transport two fully equipped combat divers and additional equipment on long range missions.

  • DSV

    Deep Submergence Vehicle

  • DTN

    Distance to Next. The distance to the next waypoint in the route.

  • DVL

    Doppler Velocity Log

  • ECEF

    Earth-centered, earth-fixed, also known as ECR (initialism for earth-centered rotational), is a geographic and Cartesian coordinate system and is sometimes known as a "conventional terrestrial" system.

  • EMI

    Electromagnetic Interference

  • ENC

    Electronic Navigational Chart

  • EPE

    Estimated Position Error. Estimated error based on available navigation data.

  • FLS

    Forward Looking Sonar

  • FOM

    Figure Of Merit. A quantity used to characterize the performance of a device, system or method, relative to its alternatives.

  • GBS

    Global Broadcast System

  • GigE

    Gigabit Ethernet


    Global Navigation Satellite System. GLONASS is a Russian space-based satellite navigation system operating as part of a radionavigation-satellite service. It provides an alternative to GPS and is the second navigational system in operation with global coverage and of comparable precision.

  • GPS

    Global Positioning System. A navigational system using satellite signals to fix the location of a radio receiver on or above the earth's surface.

  • GUI

    Graphical User Interface

  • ICD

    Interface Control Document

  • IMU

    Inertial Measurement Unit

  • INS

    Inertial Navigation System.

  • LARS

    Launch and Recovery System

  • LBL

    Long Base Line acoustic positioning system

  • LCM

    Lightweight Communications and Marshalling. A publish/subscribe message-passing system; targeted at real-time systems where high-bandwidth and low latency are critical.

  • LOS

    Line of Sight

  • Marker

    A navigation aid. Markers have no navigation utility but are useful for marking mission features or events. Saved in the mission along with route waypoints

  • MLO

    Mine Like Object

  • MOB

    Man Overboard marker. Used in Workspace to record the position and attitude of the vehicle at the moment in time.

  • MPL

    Mission Planning Laptop.

  • Multicast

    Group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution.

  • NED

    North East Down

  • NIC

    Network Interface Card. Allows both wired and wireless communications. Allows communications via Local Area Network (LAN) as well as communications over large-scale network through Internet Protocol (IP).

  • NTP

    Network Time Protocol. A networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.

  • OEM

    Original Equipment Manufacturer


    Open Software and Equipment Architecture. Greensea open architecture software platform for the marine robotics industry; the foundation on which all Greensea technology is built.

  • Path following

    A control law that keeps the vehicle on the path between two waypoints.

  • PCB

    Printed Circuit Board


    Primary Communications. Generic communications between vehicle components (devices, navigation, and control) and topside components (operator interfaces).

  • PCS

    Payload Control Software

  • PID

    Proportional–integral–derivative controller (PID controller or three-term controller) is a control loop mechanism employing feedback that is widely used in industrial control systems and a variety of other applications requiring continuously modulated control.

  • POE

    Project Opensea Environment. Also, in networking: Power over Ethernet.

  • POI

    Point of Interest


    Remote Communications

  • RF

    Radio Frequency

  • RNAV

    Recon Navigation System

  • RNC

    Raster Navigational Chart

  • Route

    Mission Planning/Navigation: A collection of waypoints and tracks from a starting point to an endpoint. Networking: A path for network traffic, in a network or between or across multiple networks.

  • ROV

    Remotely Operated Vehicle


    Satellite Communications

  • SDI

    Serial Digital Interface

  • SDK

    Software Development Kit. A set of tools, guidelines, and programs used to develop applications for a specific platform.

  • SLAM

    Simultaneous Localization and Mapping

  • SOG

    Speed Over Ground. Current vehicle speed relative to the seabed.

  • TMS

    Tether Management System

  • TTN

    Time to Next. The time to the next waypoint in the route based on the present transit speed.

  • UAV

    Unmanned Arial Vehicle

  • UI

    User Interface

  • UMAA

    Unmanned Maritime Autonomy Architecture

  • USBL

    Ultra Short Base Line acoustic positioning system

  • USV

    Unmanned Surface Vessel

  • UUV

    Unmanned Underwater Vehicle.


    Versatile and Lightweight Observation ROV

  • vLBV

    Vectored Little Benthic Vehicle

  • VM

    Virtual Machine

  • Waypoint

    A geographical location/destination. A three-dimensional point in the water described by a Latitude, Longitude, and depth (or altitude). The fundamental component of a mission or a route is a waypoint.

  • Waypoint Tolerance

    Waypoint radius. When the vehicle reaches the waypoint tolerance it will consider the waypoint achieved.


    "What You See Is What You Get"

  • XTE

    Cross Track Error. The distance to the left or right the vehicle is from the path. This is the error in the path following control law.

  • θ

    Pitch. Vehicle movement around the Y axis. For example, the vehicle noses up or down.

  • Φ

    Roll. Vehicle rotation about the X axis. This can be seen in body tilt from side to side.

  • Ψ

    Yaw (heading). Vehicle rotational travel from the Z axis (vertical) or crablike movement.

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