and therefore can be easily used flying "raw data", following the flight director or fully autocoupled.
The 737 FCTM recommends the autothrottle be switched off whenever manual flying is attempted unless it is climbing after takeoff. One assumes therefore during a CDA approach hand flown on the flight director as above, the pilot would also be using manual throttles. This usually causes some consternation in automated aircraft, as pilots are so ingrained in using full automatics which of course include autothrottle, that their manual throttle handling becomes a trifle hairy to say the least! In turn their speed control is rusty and inevitably approaches can become unstable. It depends largely on the currency of the pilot on manual flying. If not current or slightly nervous, stick to full automatics