22
Bow and Stern Thrusters
The bow and stern thrusters are controlled from
two dedicated joysticks at the left of the control
panel at the helm. They should only be used to
manoeuver the boat when docking, mooring or
maneuvering in confined spaces.
The thrusters are quite capable of pushing the
vessel sideways but you will notice the bow thruster
seems more effective than the stern thruster. It is
a good practice to make short bursts of thruster
engagement and then evaluate if the vessel is
making adequate progress in the desired direction.
Too much input generally results if further inputs
of the opposite direction to slow or reverse the process. Learn to make less of an
input and wait to see the result.
The thrusters are high-current, short-term use devices. They will significantly drain
the dedicated batteries if overused and potentially will overheat and shut down
to protect the motor from damage. For the stern thruster, the dedicated charger
and master cutoff switch are mounted on the lower portion of the transom, visible
when looking in the rear cockpit lazarette.
As mentioned in the electrical systems section, remember that the thruster
batteries will only be recharged when the ship is connected to AC power, either via
shore power or through operating the genset.
Activation:
To activate the thrusters, depress the two “on” buttons on the thruster
control panel. Note the thrusters will only activate when the ignition is on, so we
normally leave this until the engine is running. NOTE: A Master circuit breaker for
the bow thruster is located under the front stateroom berth (lift up the mattress
and access this breaker via a panel in the bed platform). This is left ON at all times,
but in the event that the bow thruster will not activate, first check that the bow
thruster master breaker is ON before calling for maintenance assistance. It remains
a mystery why it is so located!
Exhaust
The engine’s exhaust port is at the starboard stern of the vessel. At idle, you will
see a periodic burst of water as the waterlift muffler fills with seawater and the
exhaust gas pressure pushes the water out the exit port. This exhaust system and
the clean running diesel engine do a good job of minimizing the amount of diesel
soot that enters the environment. Nevertheless, please keep the salon door closed
while the engine is running to prevent diesel exhaust film from settling on interior
furnishings.
Pumps
The engine is dependent on several pumps to operate properly. Most important of
these is the seawater (raw water) pump, which circulates seawater through a heat
Thruster joysticks
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Содержание Nordic Tug 37
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