PFD

plural PFDs

1. abbreviationinitialismbusinessInitialism of phase-frequency detector.
2. abbreviationinitialismInitialism of personal flotation device.

   Return your PFD to a hanger on the PFD storage rack.

   (Can we date this quote?), “RS Quest Rigging Instructions”, in California State University, Sacramento, page 3

   1 more example

   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.

   2025 October 21, Rose George, “‘I knew in my head we were dying’: the last voyage of the Scandies Rose”, in The Guardian

3. abbreviationinitialismInitialism of primary flight display.
4. abbreviationinitialismInitialism of process flow diagram.
5. abbreviationinitialismInitialism of photon flux density.

1. abbreviationinitialismnot comparablebusinessInitialism of prepared for dyeing.