The tunnel thruster system includes a thruster propulsion mechanism including a drive unit driving {HEAD ~ a transmission and propeller assembly} located within {TAIL ~ a thruster tunnel} 
located within
The tunnel thruster system includes a thruster propulsion mechanism including a drive unit driving { HEAD ~ a transmission and propeller assembly } located within { TAIL ~ a thruster tunnel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL