Meet the Maxwell Altus Slimline Deck Hatch Trapezium – a purpose-built escape and ventilation hatch engineered for serious sea conditions. With a sleek 23mm low-profile profile and a satin sheen anodised aluminium frame, this hatch blends into the deck while delivering rugged, watertight performance when you need it most. Designed for ocean use and deck-mounted installation, it offers a dependable blend of safety, airflow, and controlled access.

Why this hatch stands out

• Ultra-slim, oceangoing build: A mere 23mm high, the Altus Slimline sits low enough to minimize deck obstruction while maintaining a robust escape hatch and ventilation option.
• Secure, versatile operation: Open from inside or outside and choose between a fully watertight position or a ventilated setting to suit weather and comfort needs.
• Precise, easy adjustment: Carefully designed hatch adjusters let the lid hold at almost any angle up to 90°, providing secure ventilation without slamming shut.
• Durable, corrosion-resistant finish: Satin sheen anodised aluminium frame not only looks refined but is built to resist marine corrosion in demanding environments.
• Flush deck integration: The frame recesses 14mm below the deck surface for a clean, flush appearance and reduced snag risk.

Technical details at a glance

• Product name: Maxwell Altus Slimline Deck Hatch Trapezium
• Overall external dimensions (Top × Height × Bottom): 543mm × 681mm × 447mm
• Cutout size (Top × Height × Bottom): 464mm × 607mm × 378mm
• Material: Satin sheen anodised aluminium
• Mounting: Deck-mounted escape hatch designed for ocean use
• Profile: Low-profile, only 23mm high
• Frame finish: Satin sheen anodised for durability and aesthetics
• Recess: 14mm below deck surface for a seamless deck plane
• Operation: Can be opened from inside or outside; adjustable lid up to 90°

Ideal use cases

• Navigation and engine rooms requiring reliable ventilation without compromising watertight integrity on open seas.
• Cruisers, fast daysailers, and motor yachts where a slimline hatch preserves deck space and aesthetics.
• Safety-conscious installations on boats that demand an escape hatch you can trust in rough conditions.

How this hatch helps you manage airflow and safety

• In calm conditions, keep the lid fully watertight to protect interior spaces while still allowing controlled ventilation when needed.
• In rough weather, deploy the hatch to maintain a safe escape route with a wide 90° opening and a secure lid hold.
• The trapezium shape and recessed frame reduce snag hazards and water ingress, enhancing both safety and usability on deck.

Installation and care tips

• Plan the deck cutout to match the specified dimensions for a precise fit and an optimal seal.
• Use the recessed frame as a guide to ensure a flush deck surface and to minimize tripping or catching on the hatch edge.
• Clean with mild marine-safe cleaners to preserve the satin anodised finish and prevent corrosion over time.

The Maxwell Altus Slimline Deck Hatch Trapezium delivers a distinct combination of low-profile design, rugged ocean-grade performance, and flexible operation. If you’re equipping a decked environment where space is at a premium but reliable escape and ventilation are non-negotiable, this hatch is engineered to meet those demands with precision and reliability.