Sketch and describe an automatic sprinkler, fire detection and alarm system for accommodation spaces and explain sprinkler head operation and temperature rating?

flowchart TD
    A[Sea Chest / FW Tank] -->|water| B(Main Sprinkler Pump)
    A -->|water| C(Emergency Sprinkler Pump)
    B --> D[Pressure Tank]
    C --> D
    D --> E[Distribution Header]
    E --> F1[Section Valve 1]
    E --> F2[Section Valve 2]
    F1 --> G1[Sprinkler Heads\nAccommodation]
    F2 --> G2[Sprinkler Heads\nGalley]
    G1 -->|flow| H1[Flow Switch 1]
    G2 -->|flow| H2[Flow Switch 2]
    H1 --> I[Alarm Panel\nBridge + Crew Station]
    H2 --> I
    B -->|power| J[Main Switchboard]
    C -->|power| K[Emergency Switchboard]
    J -->|control| I
    K -->|control| I

• System type: automatic wet pipe sprinkler with fire detection and alarm, water-based extinguishing medium
• Core requirement: automatic operation with no human action needed to set it in operation
• Water supply: continuous for minimum 30 minutes, seawater capable
• Power: main and emergency sources for pump and alarm/detection system
• Piping: wet pipe type; small exposed sections may be dry pipe where necessary
• Sections: max 200 sprinklers per section, each isolated by one stop valve
• Alarms: visible and audible at centralized panel on navigating bridge and elsewhere, indicates which section activated
• Sprinkler head: automatic type, opens at rated temperature to discharge water
• Temperature rating: selected by space ambient temperature; saunas require sprinkler heads with operating temperature up to 140°C
• ETO role: ensures electrical power supplies, alarm circuits, pump controls and monitoring systems are maintained and tested