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 {HEAD ~ the second tapered tunnel sections} oriented substantially transversely to a keel of the vessel and accommodating {TAIL ~ 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 { HEAD ~ the second tapered tunnel sections } oriented substantially transversely to a keel of the vessel and accommodating { TAIL ~ the transmission and propeller assembly }
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