Furuno FCR-2107 series, Operator'S Manual

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2. Radar Operation
2-9
2.5 Entering Own Ship's Speed
The Target Tracking (TT) and azimuth stabilized presentation modes require own ship speed input and compass
signal. The speed can be entered from a log (STW) or GPS (SOG), or manually from the menu. Note that FURUNO
GPS Navigator GP-90 provides COG and SOG.
For more information about positioning and Kalman filter operation, see Chapter 15 Navigation Sensors.
2.5.1 Speed selection for SPD and SB (TT, AIS and trails)
System speed which is in use for TT, AIS and trails appears at the upper right corner in fields "SPD" and "SB."
These values are used for:
- Calculation of target CPA/TCPA
- Target past position
- Target trail
Note 1: SPD: Longitudinal speed, SB: Transversal speed, positive value to starboard
Note 2: When the AIS feature is active, MANUAL and REF are not available for selection.
To select system speed "SPD" and "SB", do following:
1. Place the cursor on the SPD or SB field in the information area then push the left button to show the following
dialog box..
2. Put cursor on Speed source (LOG(BT) in this case) and use scrollwheel to select appropriate source.
2.5.2 Speed selection for COG and SOG (navigation)
System speed which is in use for navigation appears at "COG" and "SOG." These values are used for:
- TTG calculation
- Route Monitoring for ETA calculation
- Kalman filter for position calculation
- Dead reckoning for position calculation
Note 1: Availability of sensors for selection from the SENSORS dialog box depends on the devices interfaced with
this system.
Note 2: When the AIS feature is active, MANUAL and REF are not available for selection.
The operator can select the navigation sensors to use for navigation and view their current values on the SENSORS
dialog box. For more information about source of speed used by system, see Chapter 15 Navigation Sensors..
1. Place the cursor on the COG or SOG field in the information area.