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VDO MAP 7w Plus GPS User Manual
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Contents
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88 User Manual♦ Turbocharger Turbine Inlet TemperatureExhaust gas temperature before the turbocharger.♦ TWD = True Wind DirectionDirection of the Wind relative to a fixed point on the earth.♦ TWS = True Wind SpeedVelocity of the Wind relative to a fixed point on the earth.♦ Underwater ObjectsObjects like obstruction, wreck, cable…♦ User PointObject you place on the chart identified by its coordinates and displayed onthe screen with a reference symbol (see Mark, Waypoint).♦ UTC = Universal Time CoordinatedTime scale based on the rotation of the earth that is used by most broadcasttime services.♦ UTM = Universal Transverse MercatorMetric Grid system used on most large and intermediate scale land topo-graphic charts and maps.♦ VariationAngle between the magnetic and geographic meridians at any place, expressedin degrees West or East to indicate the direction of magnetic North from trueNorth. It changes from point to point, and (at the same point) with time.♦ VMG= Velocity Made GoodDestination closing Velocity. The VMG is calculated using the current speed ofthe vessel (SOG) and the difference between the current vessel course andthe bearing to the destination.♦ VRM= Variable Range MarkerVRM is a circle and its radius is determined by the user. The circle's center isthe ship's or cursor position.♦ WAAS = Wide Area Augmentation SystemThe Federal Aviation Administration (FAA), in cooperation with other DOT or-ganizations and DOD, is augmenting the GPS/SPS with a satellite-based aug-mentation system, the WAAS. It will provide a signal-in-space to WAAS users tosupport en route through precision approach navigation. After achieving initialoperational capability, the WAAS will then be incrementally improved over thenext years to expand the area of coverage, increase the availability of precisionapproaches, increase signal redundancy and reduce operational restrictions.♦ WaypointAny point to which one intends to navigate. A sequence of Waypoints makesup a Route plan.♦ WGS-84 = World Geodetic System 1984Coordinates System or Datum developed by the Defence Mapping Agency(DMA). It is the default geodetic Datum used by the chart plotter and the GPS.♦ Zoom-InShows more detail in a smaller area.♦ Zoom-OutOperates similarly to zoom -in, but in the reverse, showing a wider but lessdetailed view.♦ XTE = Cross Track ErrorDistance from the ship's present position to the closest point on a line betweenthe origin and destinations Waypoints of the navigation. |
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