29. Steering With Yokogawa PT-500A
29-7
29.4.6 Route steering alarms
The alarms relevant to the Steering are of two types (permanent and intermittent).
Permanent alarms below are available regardless of the used
steering mode:
Outside Channel
red color of the “Off track” value
orange color text “Outside Channel”
Out of Gate is indicated by orange text. Out of gate indicates
that, if the vessel continues using the current course, then the
vessel will be outside of the channel at wheel over point.
Permanent alarm below is available only during route steering
mode:
Rate of Turn Limit is indicated by orange text
Intermittent audio/visual alarms appear as follows:
• visual alarm and buzzer is located in ECDIS control unit.
• alarm number and text is visible on the lower right corner of the ECDIS display (see example below)
Typical intermittent alarms not described in other chapters are:
Alarm “2457 Route: Outside chl limits”, which appears if the own ship is outside the planned channel.
Alarm “2455 Route: off course”, which appears, if the system needs more than a set limit (the limit is available in
Installation parameters) to keep the track. This alarm is repeated every 5 minutes, if the condition continues.
Alarm “2456 Route: WP approach error”, which appears, if because of for example decreasing speed the own
ship is more than waypoint approach alarm time + 100 seconds away from the wheel over point after the user have
already acknowledged alarm “2451 Route: WP approach alarm” to enable the next automatic turn. After the alarm
2456 the next turn is not enabled and the system will generate a new alarm “2451 Route: Wp approach alarm” when
appropriate.
Alarm “2460 Pilot: ROT will be exceed”, which appears, if the set radius value together with the current speed of
the ship request rate of turn which is over the limit set in Route Parameter Max. rate of turn.
Alarm “2461 Route: ROT will be exceed”, which appears, if the planned radius for next waypoint together with the
current speed of the ship request rate of turn which is over the limit set in Route Parameter Max. rate of turn. This
alarm is activated if the own ship is within value WP approach alarm time set in Route Parameters from the wheel
over point.
To Next Page
Loading...
