A Bollard spline for use with shipping, nominal spacing 5 metres.
The spline is set at a height to suit a water depth of 7 metres, but can be raised or lowered to any level required and may be bent to a suitable shape.
If you do not want a new segment to join to a near previous one, hold down the shift key when placing or adjusting the second segment.
Once installed you will find the item as Bollards in splines in the Australia listing.