As seen here, seaplanes have these, or they'd be at the bottom of the sea
I wouldn't mind a hiatus on 
ohter nation's planes until these two nations each see an extra... [DOC] [TLE] Seaplane Terminology Wiki/Dictionary - Seaplane Pilots Association [PAR] An extremely informative and visual dictionary of seaplane terms and ... more 
about seaplane flying and understand what seaplane pilots need to know.