The unit is preset to receive 19000 pulses per nautical
mile from the log transducer (paddle wheel). However,
the figure might have to be changed to compensate for
various transducers and actual waterflow passing the
transducer. The correct pulse rate is calculated by:
19000 x indicated speed (eg. 4 kn)
= 15.200 pulses/nm
actual speed (GPS) (eg. 5 kn)
Measurement units:
NAUTICAL MILE
1 nm is 1,852 metres
KNOTS
nautical mile per hour
KILOMETER
1 km is 1,000 metres
kilometer per hour
STATUTE MILE
1 mile is 1,609 metres
mile per hour
Motion can be set to TRUE or RELATIVE.
TRUE= the ship will move across the chart.
RELATIVE= the ship is locked to the center of the
screen and the chart will move.
Orientation can be set to
NORTH UP, HEAD UP
, or
NAV
UP
, and the rotation resolution preset to 15° can be set
to adjust the chart for each 5, 10, 15, 20 and 25°
changes in present course or heading.
F
With cursor on chart, ’Orientation’ will always be
presented as
’NORTH UP’
.
NORTH UP
= will present the chart as north up.
HEAD UP
= the chart will automatically turn, so your ac-
tual course
(COG)
is up. If a compass is connected, the
reference will automatically change to heading (com-
pass).
NAV UP
= the chart will automatically turn, so your
bearing to destination is up.
Display position as
LAT/LON,
Loran C or decca lanes.
Log speed cali-
bration
nm
kn
km
kh
mi
mh
Motion
Orientation
Position
!PPENDIX !
'. -+)) 'LOSSARY OF TERMS
90
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