D defs.my
Entry 1 sense Webster, 1913

Convoy pennant

· Con·voy pen·nant · IPA
01 A white pennant with red border, carried: (a) Forward on all vessels on convoy duty. (b) Alone by a senior officer present during evolution…
  1. 1.
    A white pennant with red border, carried: (a) Forward on all vessels on convoy duty. (b) Alone by a senior officer present during evolutions or drills, when it commands “Silence.” (c) Over a signal number, when it refers to the signal number of an officer in the Annual Navy Register.