How To Stop Or Modify Already Enabled Route Turn - Furuno FEA-2107 Operator's Manual

29.4.8

How to stop or modify already enabled route turn

There are two cases that the automatic route turn must be stopped or modified.
• because the turn cannot be performed up to the final value.
• because the turn which ship perform goes outside of the planned turn. (Too fast or too slow).
Stop the turn
To stop turn, change steering mode from "NAVI" to "AUTO" on Yokogawa Steering control unit.
Modify turn
What do you want to do
Use value different from
set course
Compensate too fast
turning
Compensate too slow
turning
29.4.9 Notes
Accuracy of route steering
Accurate route steering is defined as small cross track error when automatically following the route. Two of the
Route Parameters - Drift compensation and Gyro error compensation - have a significant effect for accuracy of route
steering. If you need most accurate route steering, then both of these parameters should be enabled. Before
activating the Gyro error compensation read chapter Gyro error correction to understand the possible methods for
gyro error compensation.
How to do
Problem is that radius control is only available in steering mode NAVI. As soon as you
change steering mode to something else the vessel stop following radius. Below is
what you can do
Change from "NAVI" to "AUTO". This stops turning completely as current gyro
heading is selected as new set course for Autopilot. Then, set new final value of set
course and select suitable max. rudder angle to prevent too fast turning.
Set steering wheel to suitable angle to continue approximately radius (i.e. equal rudder
angle than before). Then change from "NAVI" to "HAND". Continue manual steering.
Change from "NAVI" to NFU. Then, use NFU steering lever. Continue manual
steering.
As soon as you change steering mode to something other than "NAVI" the vessel stop
following radius. Below is what you can do:
Change from "NAVI" to "AUTO". This stop turning completely as current gyro
heading is selected as new set course for Autopilot. Then set final value of set course
and select suitable max. rudder angle to prevent too fast turning.
Set steering wheel to suitable angle to continue approximately larger radius (i.e.
smaller rudder angle than before). Then, change from "NAVI" to "HAND". Continue
manual steering.
Change from "NAVI" to NFU. Continue manual steering.
As soon as you change steering mode to something other than "NAVI" the vessel stop
following radius. Below is what you can do
Set steering wheel to suitable angle to continue approximately smaller radius (i.e.
higher rudder angle than before). Then, change from "NAVI" to "HAND". Continue
manual steering.
Change from "NAVI" to NFU. Continue manual steering.
29. Steering With Yokogawa PT-500A
29-9