above water
bent
blades
boat
boats
curved
direction
drive
drive system
driven
energy
engine
force
four
goldcolored
golden
gray
grey
harbor
hydrodynamic
industrie
means of transport
metal
metallic
motor shaft
motorized
move
power
power transfer
propeller
propulsion
rear
rotate
rotation
rotational direction
rpm
rudder
shaft
ship
ships
ships propeller
speed
steer
steering
stern
system
transport
under water
vehicle
water