BOW THRUSTERS / APUs

270

090

BOW THRUSTER

APU

TWO UNITS EACH 360 DEG INDEPENDENT ON - OFF ONLY

FFG

LST/LHA/ARS/MCM

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REFERENCES: MSI STUDENT GUIDE

Notes:

BOW THRUSTERS AND APUs BRING ADDED CONTROL OF THE BOW’S MOVEMENT AT SLOW SPEEDS AND LIGHT WIND/CURRENT CONDITIONS.

LHA: WEAK THRUSTER, INEFFECTUAL.

MCM: TAKES SUCTION AMIDSHIPS AND DIRECTS WASH PORT OR STBD USING FLAPPER VALVE. IF LEFT ON AND VALVE LEFT OPEN, CAN PUSH BOW OFF THE PIER.

FFG: VERSATILE, CAN USE TO OFFSET STERN WALK USING RIGHT RUDDER, AHEAD BELL, AND APU’S DIRECTED AFT.