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 {TAIL ~ a keel} of the vessel and accommodating the transmission and propeller assembly 
oriented substantially transversely to
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 { TAIL ~ a keel } of the vessel and accommodating the transmission and propeller assembly
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