36

Effect

For  example

Input  information

Output  information

Pseudo  transit  time
measurement

GPS

Transit  time
Reference  system

LATxy
LONxy
UTC

Pseudo  transit  time
measurement  with  reference ­
  station

DGPS

Transit  time
Reference  signal
Reference  system

LATxy
LONxy
UTC

Phase  difference  of  ultralong
  waves

LORANC

Signals  of  transmitting  stations ­


LATxy
LONxy

Radar

RADAR

Radar  echoes

Position  and  distance
from  foreign  ships  and
surrounding  objects  in
relation  to  the  ship

Dynamic  pressure

Dynamic  pressure
log

Water  pressure  difference

SOGX

Electromagnetic  induction

EM-Log

Induced  electrical  field

SOGX

Doppler’s  effect

DOLOG  (xs-axis)

Reflected  signals

SOGX
STWX

Doppler’s  effect

DOLOG  (ys-axis)

Reflected  signals

SOGYx
STWYx

Hydro-acoustic  transit  time
measurement

Depth  sounder

Signal  transit  time

DEPTHx

Earth’s  magnetic  field

Magnetic  compass

Earth's  magnetic  field
Inclination
Deviation
Position

HDG

Gyro  effect

GYRO

Ship's  rotation
Reference  angle

HDG

Air  pressure  difference

Wind  sensor

Wind  speed  and  direction

RWS
RWD

Air  temperature  measurement ­


Thermometer

Air  temperature

ATEMP

Water  temperature  measurement ­


Thermometer

Water  temperature

WTEMP

Air  pressure

Barometer

Air  pressure

BAR

Air  humidity

Hygrometer

Air  humidity

RHUM

Table  4:  Characteristic  sensors
Annex  7.4.1  contains  the  functionalities  identified  for  this  task  as  well  as  the  elementary  individual  functions ­
  with  their  input  and  output  data,  in  overview  form.
42  Observing  the  environment
The  term  “environment”  comprises  the  following  areas:
•  Hydrographic  situation:  currents,  tides,  swell
•  Meteorological  situation:  e.g.  wind,  air  temperature  and  pressure,  visibility  conditions.