SOLAS regulation II-2/15 requires general arrangement plans to be permanently exhibited for the guidance of the ship’s officers, showing clearly for each deck the control stations, the various fire sections enclosed by “A” class divisions, the sections enclosed by “B” class divisions together with particulars of the fire detection and fire alarm systems, the sprinkler installation, the fire-extinguishing appliances, means of access to different compartments, decks, etc., and the ventilating system, including particulars of the fan control positions, the position of dampers and identification numbers of the ventilating fans serving each section. The flag State Administration (i. e. the MCA) may alternatively allow this information to be available in a booklet supplied to each officer.