You are the Chief Engineer on a Ro/Ro vessel powered by a MAN two stroke, direct reversing, slow speed diesel engine. While maneuvering into New York with the main engine in Bridge control status you receive low pressure alarms on both main air receivers. Both ship's main air compressors are operational and running at the time of the alarms. What should you do?
• Bridge control vs. engine control room control on a direct-reversing slow-speed diesel • The importance of maintaining starting air pressure during frequent maneuvering starts and reversals • Proper communication with the Bridge when propulsion reliability may be affected
• What is the immediate operational risk if starting air pressure continues to drop while maneuvering in a confined harbor? • How does changing from Bridge control to local control affect the bridge team’s ability to maneuver safely in traffic? • Besides checking equipment that is already running, what responsibility does the Chief Engineer have toward the Captain when a limitation in propulsion may be developing?
• Verify which mode of engine control is safest and most practical during tight maneuvering with pilot and tugs involved. • Consider whether you should both investigate the cause (e.g., compressors/air system) and inform the Bridge of any developing limitation. • Confirm that the chosen action maintains clear command and control of the vessel’s propulsion during the remainder of the evolution.
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