Furuno VR-7000 Operator's Manual page 12

1. OPERATION
Date and time: Date and time are obtained from an external GPS navigator referenced to UTC.
When an external GPS navigator is not available, a signal is recorded with a built-in clock in the
DCU.
Ship's position and datum used: Latitude, longitude and datum are obtained from a GPS navi-
gator, Loran-C receiver or other EPFS or INS available on standard serial interface. The source
of data is identifiable on playback.
Speed (water and/or ground): Speed through the water (STW) or speed over the ground (SOG)
is recorded. The resolution is 0.1 kn. Transverse speed is also indicated when available on board.
Heading (true, magnetic): Heading is recorded to a resolution of 0.1°. The data is labeled G (gy-
rocompass), GPS, GLONASS, MAG. If heading information is not available in IEC 61162 format,
an appropriate interface may be necessary.
Depth (echo sounder): Depth under keel up to a resolution of 0.1 m as available on the ship is
recorded.
Alarms: The status of all IMO mandatory alarms is recorded individually with ID number and time
stamp. Audible alarms from the alarm units are stored simultaneously by the bridge audio micro-
phones.
Rudder order/response: Rudder order and response angles are recorded up to a resolution of
1° as available on the ship. The rudder information is recorded. If more than one rudder is provid-
ed, the circuitry can be duplicated.
Engine order/response: The DCU obtains the engine order and response from the engine tele-
graph or direct engine control. The engine parameters with shaft revolution and ahead/astern in-
dicators are recorded to a resolution of 1 rpm.
All order and response from bow, stern, thruster, tunnel thrusters and controllable pitch propellers
shall be recorded.
Hull openings, watertight doors: Digital and serial signals can be input individually. The data is
stored with time stamps.
Accelerations and hull stresses: The DCU obtains signals from appropriate hull stress and re-
sponse monitoring devices. The inputs are recorded individually and stored with time stamps.
Wind speed and direction: The DCU obtains the signal from appropriate wind speed and direc-
tion sensor. The inputs are recorded individually and stored with time stamps. The wind speed res-
olution is 1 unit (1 kn, 1 m/s, etc.). The wind direction resolution is 1°.
VDR alarm output: If, as an option, such messages are sent then the appropriate sentence for-
mats are ALF and ALC.
Radar/ECDIS data: Radar/ECDIS image is recorded in the Fixed DRU, Float-free DRU and long
term device via the LAN or the video LAN converter. Range rings, EBLs, VRMs, plotting symbols,
radar maps, parts of SENC, voyage plan, and other essential navigational indications are included
in the recorded radar image. Own ship's mark and position (latitude and longitude), course, speed,
voyage plan, and other essential navigational indications are included in the recorded ECDIS im-
age. One complete picture frame is captured at intervals of 15 s. Scanning may be interlaced or
non-interlaced.
3