Marine Display / Monitor

What sets a marine display apart

A consumer or office monitor is built for a stable desk in a controlled room. A marine display sits in a bridge console, an engine control room or a wheelhouse where temperature, humidity and vibration change constantly, and where electromagnetic interference from radars, radios and power equipment can disturb a poorly protected screen. It must also be readable in direct sunlight and dimmable to almost nothing at night, so that the watchkeeper's night vision is not spoiled. Because the screen is often the main interface for an ECDIS, a radar or an integrated bridge system, its failure can take a safety-relevant function with it.

Main designs

• Bridge monitors for ECDIS, radar and conning displays, often in sizes from the low twenties of inches upward
• Glass-bridge or multi-function displays that combine navigation, engine and alarm information on large panels
• Touch displays, with a surface that tolerates damp fingers or gloves and a protective front glass
• Control-room monitors for machinery automation and alarm systems
• Panel-mount and console-flush versions, as well as monitors with a standard mounting interface on arms or brackets

Main components

• LCD panel with a backlight that can be dimmed over a wide range
• Anti-glare or optically bonded front glass, which also reduces condensation between panel and cover
• Power supply, designed for the ship's supply variations and often accepting a wide DC or AC range
• Video inputs such as DVI, HDMI, DisplayPort or VGA, and sometimes network or serial inputs for control
• Housing with a defined enclosure rating on the front, vibration-damped mounting and, if needed, a touch controller

Selection and sizing

• Screen size and resolution for the application: an ECDIS has presentation requirements, a conning display has others
• Brightness range, sunlight readability and the colour palettes for day, dusk and night that the application software expects
• Environmental category: protected indoor or exposed, which sets temperature, humidity and spray requirements
• Interfaces to the connected computer or system, and whether the signal can be routed through the existing cable
• Touch type and behaviour, tested with gloves or damp hands if the bridge conditions need it
• Mounting cut-out, bezel and cabling, so a replacement fits into the existing console

Regulations and class

Navigation displays are tested to IEC 60945 for environmental and electromagnetic conditions, and the presentation of navigational information is set by the relevant IEC and IMO performance standards. Classification societies issue type approval for monitors used in bridge and automation systems, and the approval is tied to the exact model and size. Compass safe distance is stated for equipment near the magnetic compass, because the magnets and metal parts of a monitor can disturb it.

Typical faults

• Backlight ageing or failure, giving a dim or uneven screen, often noticed first at night
• Power supply faults from ageing capacitors, causing flicker or random switch-off
• Touch drift or dead zones after contamination, scratches or loose connections in the touch controller
• Pixel defects, image sticking and discolouration with age and heat
• Cooling fan failure or blocked ventilation in monitors that are not passively cooled
• Condensation behind the front glass after fast temperature changes

What to look for in a supplier

• A type-approval certificate that names the exact model and screen size
• Declared compliance with IEC 60945 and the interface standards the system needs
• A statement on long-term availability, since panel generations change quickly
• Replacement backlights, power supplies and touch controllers for older generations
• Compatibility with the existing ECDIS or radar software, including colour and dimming behaviour

Check the screen at its lowest brightness setting on a dark bridge as part of every bridge inspection. A display that cannot dim far enough is a real fault, not a comfort issue.