The thruster tunnel comprising a propeller section, first and second tapered tunnel sections interconnected with one another by the propeller section, the propeller section and the first and the second tapered tunnel sections oriented substantially transversely to {HEAD ~ a keel} of {TAIL ~ the vessel} and accommodating the transmission and propeller assembly 
The thruster tunnel comprising a propeller section , first and second tapered tunnel sections interconnected with one another by the propeller section , the propeller section and the first and the second tapered tunnel sections oriented substantially transversely to { HEAD ~ a keel } of { TAIL ~ the vessel } and accommodating the transmission and propeller assembly
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