Captain is in charge of that company's firehouse. In a firehouse that contains more than one fire company, the Captain assigned to the engine company is in charge of the firehouse. When a Captain is not on-duty, one of the three company Lieutenants commands the unit. Each company, depending on the specific unit have the following assignments: There are 4 firefighters on Engine Companies with the fifth man or woman being the on-duty officer. Ladder Companies, Squad Companies, and the Rescue Companies staff the units with 5 firefighters on each tour or shift, excluding the on-duty officer. During each tour, each firefighter is assigned a specific "riding position" on the company's apparatus that designates what task each member is to perform at the scene of a fire or other emergency situations. Apparatus Profile 217 City-Wide Firehouses 3 Marine Stations Frontline Fire Companies 197 Engine Companies (Including 6 High-Pressure Engines) 143 Ladder (Truck) Companies 69 Rear-Mount Aerial Ladder Trucks 61 Mid-Mount Platform Ladder Trucks 13 Tractor-Drawn Aerial Ladder "Tiller" Trucks 5 Rescue Companies 8 Squad Companies 1 Hazardous Materials Company 3 Marine Companies Command Units and Chiefs 1 Commissioner 1 First Deputy Commissioner 5 Deputy Commissioners 12 Assistant Commissioners 1 Chief of Department 8 Chiefs 14 Assistant Chiefs 10 Deputy Assistant Chiefs 14 Division Chiefs 53 Battalion Chiefs Special and Support Units 3 Decontamination (Decon.) Units 3 Marine Rescue Boats 3 Marine Support Boats 3 Marine EMS Boats 6 Satellite Units 5 Collapse Rescue Units) 6 Recuperation and Care (RAC) Units 5 Mask Services Units 2 Tactical Support Units 2 High-Rise Units 1 Foam Tender Unit 5 Foam Units 6 Purple K Units 5 Fire Hydrant Thawing Units 2 Fuel Response Units 2 Highway Response Units 1 FDR Drive Response Unit 10 Brush Fire Units 2 Field Communications Units 2 Mobile Command Center Units 1 Mobile Operations Center 2 Command Tactical Units 13 Fire Family Transport Units 12 HMTU 2nd Pieces 23 Rapid Response Units (Respond with Chemical Protective Clothing-CPC Ladder Companies) 25 Rapid Response Units (Respond with SOC Support Ladder-SSL Companies) 1 SOC SCUBA Support Unit 1 SOC De-watering/Salvage Unit 1 SOC Logistics Support Unit 2 SOC Rebreather Units 1 SOC Rebreather Support Unit 1 SOC Air Compressor Unit 6 SOC Air Compressor Trailers 6 SOC Lighting Trailers 6 SOC Flood Water Response Units 6 SOC Low Water RHIBs (2 per trailer) 1 SOC Haz-Mat. Mass Decontamination Unit 10 SOC