Dennis....have never seen
the underwater workings of a [Portland-class cruiser], ie., the USS Indianapolis CA35....I would have assumed looking on the rudder, that by US naval vessels propulsion conventions, the
Stdb pair clockwise, and the
Port pair anti clockwise for
FWD movement
Would have been a pig to steer or navigate with mixed rotations
......... Derek
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Google confirms .....
U.S.S. Indianapolis
Powered by eight White-Forster type boilers and four sets of geared Parsons turbines
driving four out-turning propellers, the ship has a plant designed to develop 1-7,000 horsepower at 366 R.P.M. and to attain a speed of 32.7 knots [37.6 statute m.p.h.]. The builders were successful in meeting the requirements set, for the ship, and at trials at sea, exceeded the speed demanded in the contract.