056336 Rev. AA NAVIGUIDE 4000Page 2–44 2.3: Operating Procedures2.3.7 Overriding Auto Steering Mode according to ABSIf the system is configured for ABS override, the handwheel at the Main steeringposition (the main helm) may temporarily override the Auto steering mode.The ABS override feature conforms to the requirements set out in the „ABS Rulesfor Building and Classing Steel Vessels“, 4-3-4/13, 2003.To activate ABS override...While in the Auto steering mode, use the handwheel at the Main steeringposition to manually order a rudder angle above the ABS overridethreshold a .The handwheel is put into control of the rudder. „Override“ is shown ininverse video on the NAVIPILOT 4000 display and the audible alarm issounds. Other bus devices display „Overr. / Main“.The handwheel now remains in control until the ABS override mode iscancelled.The audible alarm may be muted by pressing the „ACCEPT“ key at theNAVIPILOT 4000 to acknowledge the alarm.a.The appliccable threshold is set during system installation. The default value forthe threshold is 5 degrees, in accordance with the requirements of the ABS rules.To cancel the ABS override mode...Select a manual steering mode (FU or NFU).ABS override mode is cancelled and the selected steering modebecomes active. If the alarm has not been acknowledged yet, press the„ACCEPT“ key at the NAVIPILOT 4000 now.The Auto steering mode may now be selected again to resume auto-matic steering.NoteWhen the system is configured for ABS override, the helm wheel must be put tothe midship’s detent before switching to the Auto steering mode. Otherwise, anABS override condition will occur when the Auto steering mode is activated.The ABS override feature allows to override the Auto steering mode only if theMain steering position is active. ABS override cannot be used to override the Autosteering mode at a Remote steering position.
