12 - INFORMATION FOR USE 354
12.10.1 Operating in shallow water
CAUTION
COLLISION HAZARD - Use extra caution in shallow water or where un-
derwater/oating objects may be present. Hitting an object at high speed
or at an acute angle can seriously injure people and damage the yacht.
WARNING
In order to achieve the best compromise between comfort and speed,
while minimizing fuel consumption, it is recommended to keep the engine
operating speed in the range between 1500 and 2000 rpm.
Observing the following guidelines will improve comfort, minimize noise in-
side the yacht, avoid damage and assist in the proper operation of the yacht.
• Do not run the engines at idle longer than necessary.
• Avoid sudden accelerations and decelerations, which create stress on
engine turbochargers.
• Run at idle for a few minutes before shutting down the engines, to allow
a gradual cool-down.
• Once the yacht is at cruising speed, the engine instrumentation readings
should remain steady. However, if, during normal operating conditions,
the engine gauges show abnormal or contradicting values, investigate
for possible systems and/or equipment problems or failures (stop the
engines).
• Monitor the control panel gauges and system condition alerts frequently.
• Once in open waters and well clear of other boats, increase the engine
rpm gradually, until the desired speed is reached. Adjust the interceptors
positions for the best performance. For information on adjustments refer
to the Manufacturers Manual.
• Adjust the speed to accommodate sea conditions.
• Check the engine exhausts. Very black smoke means in particular dirty
lters or unburned fuel, due to improper calibration of injection pumps
or injectors. Very white smoke may mean presence of water in the fuel.
Bluish smoke may mean abnormal oil combustion.
• In case of abnormal vibration, reduce speed and run at slow rpm until the
cause of the vibration is determined. If the vibration is severe, take the
engines out of gear. It may be necessary to check the propeller condi-
tion. It may also be necessary to have a specialist check the propeller
shaft alignment.
• Perform a visual inspection of the bilges periodically.
For the supply of fuel to consider the distance that we intend to cover.
WARNING
While the yacht is underway, all persons on board must be seated in the
designated seating areas in order to prevent injury due to falls caused by
sudden yacht movements in active wake areas or in the event of sudden
changes in yacht speed or during manoeuvring. No one should be seated
on the spoiler or forward decks when the yacht is navigating.
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