The Maxwell Altus Slimline Deck Hatch 581mm x 581mm is a purpose-built escape and ventilation hatch engineered for serious ocean use. Crafted in satin‑sheen anodised aluminium, it pairs a robust, corrosion‑resistant shell with a remarkably low profile—just 21 mm high—so you keep deck lines clean without sacrificing safety or airflow.

Key details at a glance: external overall width and height of 581 x 581 mm, a cut‑out size of 507 x 507 mm, and a deck recess of 22 mm. This carefully balanced geometry ensures a secure, flush fit on deck while delivering a reliable escape route and versatile ventilation when you need it.

Why the Maxwell Altus Slimline stands out

• Dual-function reliability: acts as both an escape hatch and a ventilator, giving you a safe egress option and practical airflow on hot or engine-compartment crawls.
• Low-profile, high-performance: a slim 21 mm high profile minimizes snag hazards and deck clutter, ideal for sleek deck layouts and cockpit aesthetics.
• Operates from inside or outside: engineered for flexible access, so you can open the lid from either side, even in tight spaces or during routine checks.
• Precise, user-friendly adjustment: innovative hatch adjusters let the lid stay open at virtually any angle up to 90 degrees, giving you control in changing conditions.
• Watertight or ventilated by design: lock it shut for full watertight integrity, or leave it in a ventilation position to improve cabin airflow without compromising safety.
• CE classified and ocean-ready: built to meet rigorous standards for marine use, ensuring durability in saltwater environments.
• Protected, recessed deck fit: frame profile recesses 22 mm below the deck surface for a sleek flush appearance and improved deck hydrodynamics.
• Solid dimensions and installation clarity: external 581 x 581 mm with a 507 x 507 mm cut-out, NZ Code 4646 compliance, and a sturdy aluminium frame designed to withstand voyage‑grade conditions.

Ideal applications and use cases

• On sailboats, motor yachts, and commercial vessels where a dependable escape hatch is required without sacrificing deck aesthetics.
• In cockpit or superstructure decks that demand quiet ventilation during hot passages or engine busy times.
• Where a fast, reliable egress is essential for safety drills, emergencies, or routine inspections.
• Anywhere a low‑profile, durable hatch can improve airflow while maintaining watertight integrity when needed.

Who should consider this hatch

Owners or skippers seeking a high‑quality, ocean‑rated hatch that won’t dominate the deck aesthetic. It’s particularly suitable for boats where space is at a premium, yet a trustworthy escape route and ventilation solution is non‑negotiable.

Practical tips and care

• Regularly inspect the hatch adjusters for smooth operation and re-lubricate as recommended to maintain easy control of opening angles.
• Check the watertight seal when locking the hatch to ensure full protection during heavy seas or rain exposure.
• Clean the frame and seals with mild marine-safe cleaners to preserve the satin sheen finish and corrosion resistance.

The Maxwell Altus Slimline Deck Hatch 581mm x 581mm combines a discrete, rugged deck presence with versatile, dependable performance. It’s a thoughtfully engineered solution for serious sailors who value both safety and sleek deck design.