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2. INTERPRETING THE DISPLAYS
2-3
Item Description
Tide speed and
direction
Tide speed and direction is shown for three layers (measuring depths). The
displayable range is 0.0 to 9.9 kts for speed and 0° to 359° for course. Data
shown depends on the measuring mode as follows:
Ground tracking mode: Speed and direction values of measuring layers
represent movement of layer relative to ground.
Water tracking mode: Speed and direction values of measuring layers
represent movement of layer relative to near-surface water.
Nav mode: Speed and direction values represent movement of measuring
layers relative to pseudo ground.
Bottom
Ship's movement
based on ground
Dir
N
Layer 1
Measuring
depth
Tide movement
of layer 1
Speed
Layer 2
Layer 3
Tide movement
of layer 2
Tide movement
of layer 3
Layer 1
Tide movement of
layer 1 relative to
surface water.
Layer 2
Layer 3
Tide movement of
layer 2 relative to
surface water.
Tide movement of
layer 3 relative to
surface water.
Ship's movement
relative to surface
water.
Surface Layer
(Reference layer)
Ground Tracking Mode Water Tracking Mode
Nav Mode
Layer 1
Tide movement
of layer 1
Layer 2
Layer 3
Tide movement
of layer 2
Tide movement
of layer 3
GPS Satellies
Ship's movement
measured by
using satellites
(Based on ground)
Tide differential Tide speed and direction differential are shown between reference layer and
shallower of the other two layers. The displayable range is 0.0 to 9.9 kts for
speed and 0° to 359° for course. The reference layer may be selected with
REF TIDE DIFF in the MENU 1 menu. For example, if the reference layer is
layer 3, the tide differential between it and layer 1 and layer 2 will be
displayed.
Water temperature Water temperature is shown if a water temperature sensor is connected to the
current indicator. The display range is -5 to 99 (°C).
Water temperature
graph
Water temperature over the latest 15 minutes is displayed with a blue line, the
data scrolling from right to left. The range of the temperature scale is 5°C and
the range of the time scale is 15 minutes.