User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 140 / 04 (2011-11)
Operating Instructions
C-1 Voyage Planning
C VOYAGE PLANNING & MONITORING.fm
C-24
Maximum Speed [MAX SPD]
Meaning: The Maximum Speed defined for a leg is used by the system as the speed limitation for the
Calculated Speed between each From waypoint and To waypoint (i.e. each leg).
This limitation by the MAX SPD values takes place leg by leg with manual setting of the Planned Track
Speed as well as during the frequent recalculation in ETA mode.
Course Limit [CRS LIM]
This route parameter is only relevant in systems equipped with a TRACKPILOT.
Meaning: Alarm limit of the TRACKPILOT for the difference between set course and actual course (the
course deviation). It also influences the possibility of switching the TRACKPILOT over to Track mode and
the corrective actions performed by the TRACKPILOT if the ship deviates from the track, see chapter "G
- TRACKPILOT" on page G-1.
Track Limit [XTD LIM]
Meaning: Alarm limit of the system for the deviation from the route (the off-track distance to the track
line is indicated as XTD in meters). The track limit also influences
- the ECDIS monitoring, see Section 4.4
- the checking of deviations from the System Route.
- the possibility of switching the TRACKPILOT over to Track mode,
- the control precision of the TRACKPILOT in Track mode,
- the filtering and monitoring of the external position-data by the TRACKPILOT in Track Mode.
Sailing Mode [Sail]
Meaning: This setting specifies whether the track segment between two waypoints is to be computed
and used as the basis for steering with the TRACKPILOT and displayed on the chart as a Great Circle
or as a Rhumb Line.
The default setting defined by the program is the Great Circle mode (a new route starts with GC mode
on each leg). In contrast to a Rhumb Line, which is steered with constant course, on a Great Circle track
the entire distance is shorter and small course changes are about to happen when the ship is following
the pre-planned GC track.
Rudder Economy [Eco]
Meaning: Optimization of the TRACKPILOT between precision of control and frequency of rudder move-
ment, depending on the prevailing conditions like the sea state and the wind. Low values for Eco means
high rudder gains and vice versa (see chapter "G - TRACKPILOT" on page G-1).
To simplify manual adjustments during use of the TRACKPILOT, this value should only be entered for
the first waypoint and at the boundary between a protected area (harbour, river, canal) or other confined
waters and an unprotected area (open sea).