Fire-Fighting Foams for Fire Brigades & Airports in Namibia

RLF 4, quarterly: it reproduces real induction, expansion and blanket behaviour through the actual appliance hardware at training-foam cost, so crews practise the full evolution — pickup, proportioning, application technique — without touching certified stock. Log the drills; auditors and insurers read foam-drill records as seriously as stock records. A brigade that drills on RLF 4 quarterly arrives at a real fuel fire with muscle memory, not theory.

Physically separated and unmistakably labelled, so a night-shift drill can never tap the certified drums — that separation is the whole discipline. Store both sealed, shaded and cool with batch numbers visible, issue first-in-first-out, and log training consumption against the drill calendar. Where a brigade holds certified concentrate from other suppliers, RLF 4 is precisely what keeps that expensive stock sealed and in test-passing condition.

The evolutions its ICAO category demands: crash-tender foam production, sweep and blanket technique on a burning-fuel geometry, monitor and handline work, and the equipment checks that only live foam exercises expose — a proportioner drifting off calibration shows up in a drill, not in a cupboard. Namibian airport services run these on RLF 4 so proficiency records stay current without consuming certified stock.

Modern environmental scrutiny of firefighting foams makes uncontrolled discharge indefensible — one more reason not to drill with operational concentrate. RLF 4 carries a cleaner environmental profile for repeated training use, and drill grounds should still be chosen so runoff is contained per the service’s environmental procedure. Rinse appliances and foam equipment with fresh water after every exercise; dried concentrate blocks pickup tubes.