PFD

Definitions

1. Initialism of phase-frequency detector.
   abbreviation, alt-of, initialism
2. Initialism of personal flotation device.
   abbreviation, alt-of, initialism
3. Initialism of primary flight display.
   abbreviation, alt-of, initialism
4. Initialism of process flow diagram.
   abbreviation, alt-of, initialism
5. Initialism of photon flux density.
   abbreviation, alt-of, initialism

Examples

“Return⟳ your PFD to a hanger on the PFD storage rack.”

“Above 32 degrees latitude in the Atlantic Ocean, commercial fishing vessels must carry⟳ immersion suits. Below that latitude, they must carry⟳ lifejackets, also known as personal flotation devices (PFDs). In other waters, the dividing line is 35 degrees. The PFDs have⟳ to be on the boat. Fishers do not have⟳ to wear⟳ them.”

CEFR level