Skid unit

A Skid Unit (called a "Slip-on" in Australia) is the common name used to refer to a complete self-contained fire fighting apparatus designed for use on/in commercially available vehicle platforms.

Skid units in their simplest form consist of a tank, pump and hose mounted on a self-contained platform.

The latest evolution for skid units utilized for public safety in the past few years has seen them become more compact in size so they will fit onto the relatively small cargo bed area of an ATV/UTV off-road vehicle.

These vehicles like the Polaris Ranger 4x4 or 6x6 chassis, along with the Kawasaki Mule 4x4, the Kubota RTV 900 and many other makes and models are gaining popularity among fire dept and ambulance services across the country.

Examples of this might be agricultural tractors without wheels incorporated in harvesting machinery, or compressors on frames installed in oil rigs.

Example of a 760 litres (200 US gal) skid unit mounted in the bed of a custom rescue vehicle.
Skid unit mounted in an ATV.