Coloque (F) falso ou (V) verdadeiro nas afirmativas abaixo, em relação a propulsores e sistemas de governo empregados em rebocadores, de acordo com o livro “Tug Use in Port”, recomendado pela Circular da IMO Msc 1101:

( ) Single screw tugs are usually best to some alongside for assistance of a submarine.

( ) An open fixed pitch propeller develops more thrust astern than an open controllable pitch propeller when fitted in a conventional tug going full astern.

( ) The nozzle type “backing nozzle”, has been developed to give better efficiency for a tug going astern, which results in a little less efficiency going ahead.

( ) Nozzles increase the efficiency of the propeller and increase the steering capabilities of a tug.

( ) The performance of a becker rudder when the tug has speed astern is better as that of an unflapped rudder.