How do you sketch a watertight door and frame, show its attachment and bulkhead reinforcement, explain the hydrostatic sealing, and describe the remote closing stations?

flowchart TD
    A[Bulkhead] -->|bolted| B[Door Frame]
    B -->|gasket| C[Sliding Door]
    A -->|doubling plates\nstiffeners| D[Reinforcement\naround aperture]
    C -->|hydrostatic pressure| E[Compresses gasket\nseals mating face]
    C -->|local control| F[Port side station]
    C -->|local control| G[Starboard side station]
    C -->|remote| H[Navigation Bridge\nstation]
    H -->|indicators| I[Door open/closed\nat all stations]
    C -->|alarm| J[Audible at door]

• Sketch content: sliding watertight door, steel frame, frame bolted to bulkhead, doubling plates/stiffeners around aperture, gasket on mating face
• Attachment: frame secured by bolting or approved method; watertight joint material unaffected by heat/environment
• Reinforcement: bulkhead faired and adequately stiffened around opening so no stress distorts door/frame
• Hydrostatic sealing: pressure forces door against frame, compressing resilient gasket; frame and bulkhead reinforcement prevent distortion; proper seating between bulkhead, frame and door
• Remote closing: power-operated sliding door, local control from both sides, remote from navigation bridge; position indicators at all remote stations; audible alarm at door; at least two means of operation; hand gear at door
• Closing stations: three stations — local on each side of bulkhead, and navigation bridge
• Governing instrument: SOLAS Chapter II-1 Regulation 13-1