Furuno FEA-2107 - Goto Track Mode; Summary of Automatic Route Steering Modes

28. Trackpilot
28-10
28.5.2 “Goto track” mode
• Mode selection GO TO TRACK
• GO TO TRACK button and ROUTE and TRACK lamps are lit.
• Tiller can be used to set radius, but not heading, which is set automatically.
• Steering is track-controlled with set radius.
• If wind, current, etc. affect the ship between waypoints, the system tries to prevent the ship from drifting from
the planned route. The system has three means to prevent drifting from the planned route, and they are most
effective when used together. If cross-track error is used alone, the own ship stabilizes typically in a constant
off-track position. The means are:
• Measured cross-track error from the center line, which is always active
• Drift compensation available from route parameters
• Gyro error compensation available from route parameters
• Can be used when the ship has high-precision position source available.
• Goto Track mode uses non-dynamic waypoint.
28.5.3 Summary of automatic route steering modes
GO TO WAYPOINT GO TO TRACK
Set course
Set radius
Radius control
Dynamic waypoint location
Design before execution
Full curved EBL on radar screen
Wind, current, etc. compensation in linear parts between wpt.
Wind, current, etc. compensation in turns
Automatic
Automatic / Manual
Yes
Yes
Yes
Yes
Low gain
No
Automatic
Automatic / Manual
Yes
No
Yes
Yes
High gain
Yes
Needs gyro
Needs log
Precision of position equipment
Needs direct sog/cog sensor
Yes
Yes
Good
1
No
Yes
Yes
High
i
Yes
1
Precision of position is good with LORAN and GPS.
1
Precision of position is high with DGPS and SYLEDIS.