Pennant /(pĕn"nant)/

Pen·nant

Pennant

n.
  1. A small flag; a pennon. The narrow pennant, [or] long pennant (called also whip or coach whip) is a long, narrow piece of bunting, carried at the masthead of a government vessel in commission. The board pennant is an oblong, nearly square flag, carried at the masthead of a commodore's vessel. (Naut.)