The Navigator® is a blow moulded high density polyethylene barrier that has been developed for attended and unattended street work. This is a cost effective solution to ensure safety by segregating hazards and areas that could potentially cause a danger. Features And Benefits. Storage & Distribution - An effective stacking solution designed to maximise stability and storage for 40 units per pallet. Stacking Feature - Stacking feature enables each barrier to lock together to ensure safe storage and transportation. Designed for contractors to use in numerous configurations offering adaptable solutions to secure additional barriers. This free standing barrier with 360 degree swivel feet can also be positioned at a 90 degree angle to ensure stability.