P91ERS is a hook-lift appliance manufactured by EmergencyOne on a Scania 94D-220 chassis for the Grampian Fire Brigade, the appliance is compatible with a large variety of demountable modules/pods meaning it can not only load modules from its home station modules but also modules from other stations. Currently, Ballater has only one 'forestry' module, based on a flatbed module that transports a Polaris All-Terrain Vehicle (ATV). The ATV has a capacity of 6 people and also can transport a rear payload. of 795kg, the ATV is generally used for forestry incidents such as wildfires either to transport personnel where standard appliances cannot reach or to transport equipment.

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When the forestry module is loaded the appliance's callsign switches to R38G6, the prime mover works on a retained duty system and will always be turned out with R38P6.