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-20
If the data input verification results in an error state, you will be asked by the system to change your
data entry.
Some of the columns do not have alphanumeric entries but
- a selection menu (ETA/ETD: Arrival, Departure) or
- a check box or
- a selection bar (ECON).
Predefined Radius
- Already during editing the route, it is advisable to enter a radius for the first waypoint. This radius
will be copied to all other added waypoints until you set another radius. In this way it can be verified
"on-line" during editing if geometric constraints (matching of length of the legs, radius, and amount
of course change) are violated.
- It is recommended first to use a sort of "default" radius for sailing with nominal speed which could
later be adjusted for your needs and depending on the results of the verification of the route on the
chart display. The default radius should create a rate of turn far below the maximum rate of turn
you would normally accept for your ship under the planned loading conditions.
- The predicted steady state turn-rate at a waypoint caused by the planned radius can easily be esti-
mated by the calculation
ROT [°/min] ~ sailing speed [kn] / radius [NM]
Table C / 1 Route Editing - Predefined Radius
Speed Radius
ROT
[estimated]
25 kn 1.00 NM
~ 25 °/min
25 kn 0.50 NM ~ 50 °/min
12 kn 1.00 NM ~ 12 °/min
10 kn 0.10 NM ~ 100 °/min
Be sure not to plan too small Radius values at high speed which would cause too
high and possibly dangerous turn-rates on your ship.
1)
1)
The maximum ROT and the minimum allowed radius at nominal speed should have been
defined during the sea trials. Both values are parameters of the system configuration on service
level. The radius input during route planning is limited by the parameters min. and max. radius.