Operation Manual

Page 116 CP590
HDOP/VDOP (Horizontal/Vertical Dilution of Precision): Parameter indicating the precision
of the positioning system (GPS). The smaller the HDOP/VDOP value, the more
accurately the position fix is provided.
HEIGHT: The current Tide Height referred to the vertical cursor.
HEIGHT WATER: The maximum level of the Tide Height in 24 hours.
LOW WATER: The minimum level of the Tide Height in 24 hours.
PINGO: Mound of earth-covered ice found in the Arctic and subarctic that can reach up to
70m (230ft) in height and up to 600m (2.000ft) in diameter.
Position Request: Marine DSC VHF Function of transmitting a GPS position to another
Marine DSC VHF. When CP590 is connected to STANDARD HORIZON GPS the
position of another vessel is shown on the Chart page.
SOG (Speed Over Ground): The speed your vessel is travelling at.
SPD (Speed): Shows the Speed Thru the Water when a Digital Speed Log is connected.
STR (Steer): Heading to steer to destination Waypoint.
TIME: Shows the current time received by the GPS.
TLOG (Trip Log): Shows the distance the vessel has travelled since the Trip Log was reset.
TWD (True Wind Direction): Shows the True Wind Direction when an external wind
instrument with NMEA is connected.
TWS (True Wind Speed): Shows the True Wind Speed when an external wind instrument
with NMEA is connected.
TTG (Time To Go): Shows time to go to reach a Destination point.
UNITS
Nm Nautical Mile (1Nm = 1.15SM or 1.85km)
SM Statute Mile (1SM = 0.87Nm or 1.61km)
km kilometer (1km = 0.62SM or 0.54Nm)
ft feet (1ft = 0.167ftm or 0.305m)
ftm Fathom (1ftm = 6ft or 1.83m)
m meters (1m = 3.28ft or 0.55ftm)
kn knots (1kn = 1.15mph or 1.85km/h)
mph miles per hour (1mph = 0.87kn or 1.61km/h)
km/h kilometer per hour (1km/h = 0.54kn or 0.62mph)
VMG: It is the destination closing Velocity. The VMG is calculated using the current speed
of the vessel (SOG) and the difference between the current vessel course and the
bearing to the Destination.
WAAS 2D/3D: The GPS is receiving a 2D or 3D position and the correction from the WAAS
satellite. WAAS consists of approximately 25 ground reference stations positioned
across the United States that monitor GPS satellite data. Two master stations, located
on either coast, collect data from the reference stations and create a GPS correction
message. This correction accounts for GPS satellite orbit and clock drift plus signal
delays caused by the atmosphere and ionosphere. The corrected differential message
is then broadcast through one of two geostationary satellites, or satellites with a fixed
position over the equator. The information is compatible with the basic GPS signal
structure, which means any WAAS enabled GPS receiver can read the signal.
W-T (Water Temperature): Shows the sea water temperature when the FF525 50/200kHz
Black Box Fish Finder or a digital Speed Log/Temp instrument with NMEA is connected.
XTE (Cross Track Error): The distance your vessel is off course (left or right) to a Destination point.