Answer: pontoons

AnswerCrossword Clue
PONTOONSFloats.
PONTOONSPortable floats to aid advancing troops.
PONTOONSParts of seaplanes
PONTOONSBoats used as bridge supports
PONTOONSFloats for seaplanes
PONTOONSBridge supports
PONTOONSBoats used to support temporary bridges
pontoonsfloating support