New Activities Bar

• Refreshed look and feel for the Activities Bar
• New Quick Access button added to the bar
• Quick Access functions can be pinned to the Activities Bar
• Bar can be placed at the top, bottom, or right of the screen (Settings > Display)
• Supports "Always visible on right" or self-hiding mode — swipe from the edge over the indicator to open

New App Drawer (replaces Home Page)

The home page has been replaced by the App Drawer, a new way to launch and manage apps. Accessed via the HOME button.

• New Split (+) button is now the first app, not the last
• Dedicated Settings button (B) and panel layout edit button (C)
• Dedicated button to add apps or splits to the Activities Bar (D)
• Drag apps to reorder; hide/unhide individual apps
• The top-position app will run automatically on startup

New Quick Access Menu

Replaces the previous swipe-down-from-top menu. Accessed via the round button on the Activities Bar, or a short press of the power key (two short presses if the bar is hidden). A third power-key press closes the menu.

• More discoverable than the previous swipe gesture
• Intuitive brightness slider
• Ability to pin shortcuts (e.g. "Add Waypoint") to the Activities Bar
• Function buttons can be pinned/unpinned from the Quick Access menu itself

Automatic Backlight Adjustment on Startup

Addresses the issue of users starting their device with the screen dimmed from the night before, causing the display to appear unresponsive.

• Startup check: System checks if brightness is at a very low level
• Daylight detection: Uses GPS or internet time to determine if it is daytime
• Auto-adjust to 50%: If starting during the day, brightness is automatically raised to 50%
• Override option: A dialog lets users cancel the adjustment if preferred

Settings Access & Changes

• Multiple paths to enter Settings: Activities Bar home key, Quick Access Menu, or Goto Settings
• New X button to exit Settings more easily
• Users can now specify the number of detected tanks — required for Yamaha® app tank display
• Six-way split now available on NSS4 (previously max was four). NSX remains at four. NSO4 also supports six.

Light & Dark Theme

A choice of light or dark display theme is now available.

New Alerts System

Alerts have been completely redesigned to be clearer, more informative, and easier to act on.

• Clear Headers: Straightforward title summarising the issue at a glance
• Detailed Descriptions: Additional context explaining the cause of the alert
• Relevant Data Values: Key data points displayed to aid troubleshooting
• Actionable Buttons: Built-in action buttons guide users to the next logical step

Status Bar

• Immediate System Feedback: Real-time indicators for connectivity and system activity without navigating away from your current view
• Faster Troubleshooting: Clear visual cues help identify issues like lost network connection
• Consistent At-a-Glance Information: Essential system details always available in a predictable location

Overview

The OP55 Remote Controller features a keypad designed to operate NEON OS multifunction displays. High-quality aluminum dial with knurled edge for precise control, plus built-in cursor functions.

• Controls up to six compatible multifunction displays running NEON OS
• Customizable key for added flexibility
• Low-profile dash mount or full flush-mount (optional bracket)
• Integrated high-decibel speaker for critical alarms
• Available in portrait (000-16516-001) and landscape (000-16517-001) orientations
• Compatible with Simrad® NSO®4, NSS®4, NSX® / B&G® ZEUS® SRX, ZEUS® SR, Zeus® S

Front Panel Key Reference

Display to Keypad Assignment Setup

1. Hold the DISP key for 5 seconds to enter configuration mode. Each display shows a blue border with a randomly assigned letter.
2. Short presses of DISP move the assignment dialog to the desired display.
3. Use the on-screen interface to assign a controller number to each display letter. Repeat for all displays, then select Done or X on the OP55.

Measurement Tool Improvements

More intuitive and flexible measurement workflow including the ability to define and manipulate measurement points (A & B), reverse measure direction, and preview range and bearing.

Full Chart Inspector — Floating Panel

The full chart Inspector has moved from a fixed right-hand side panel to a new floating information box. The Inspector can now be dragged anywhere on screen to maintain focus on navigation. All extended menu items share the same floating box.

Loran TD Position

• The instrument bar widget can now show vessel position as a Loran TD coordinate
• Activate via Settings > Preferences > Additional Loran TD Coordinates
• Users can select their Group Repetition Interval (GRI) chain number

Route Editing Improvements

• Floating dialog box with clearer route options when a route is selected
• Prominent Stop Navigation button when a route is active
• New legs inserted into an Autoroute are automatically routed
• Ability to add a route point (D) and save an Autoroute as a regular Route (E)
• Route point order can be changed by drag-and-drop within the route list — press & hold then drag up or down

Waypoint Editing Improvements

Waypoint editing has moved to movable floating dialog boxes. Entering coordinates is now via a floating dialog — drag the chart to the location or type in the coordinates directly.

AIS — Colored Targets

Colored AIS targets allow watchkeepers to instantly recognise vessel status without reading text or selecting individual targets.

Additional Chart Enhancements

• Heading Extension Line: Can now be set by time at current boat speed (previously distance only)
• Text Magnification: Enlarges chart text and artifacts — useful on large screens viewed from a distance. Chart Menu > Chart Detail > Text Magnification
• Orientation Control: Chart orientation control added to the chart menu (in addition to the top-left button)
• Autopilot Engagement Alert: When commencing route navigation, users are prompted to engage the autopilot if one is fitted. Can be toggled under Settings > Alerts
• Chart Search Relocated: Moved to the Chart Quick Access menu. New coordinate search added; user-created data moved to top of search categories
• Marine Protected Areas: Displayable with latest chart data. Chart > Overlays > Marine Protected Areas
• Seabed Areas: Seabed vegetation areas now displayable. Chart > Layers > Seabed Area. Options: all, Vegetation (Posidonia) only, or none

Autorouting Improvements

Improved autorouting engine with bug fixes. To benefit from the improvements, both NEON 2.5 and updated chart data are required.

ActiveTarget® & ActiveTarget® 2 Support

Lowrance® ActiveTarget® and ActiveTarget® 2 modules are now supported, including the new ActiveTarget® 2 XL transducer with best-in-class resolution and the largest field of vision from a single transducer.

Once an ActiveTarget module is detected, the ActiveTarget app appears. A maximum of two modules are supported simultaneously.

ActiveTarget® Modes

• Scout Mode: Scan large areas for fish and structure; ideal for finding schooling fish
• Forward Mode: View distance and depth of fish or structure ahead of the transducer
• Down Mode: Pinpoint fish or structure directly below the transducer

Key settings across modes: Mode selection (or Auto), Range, Contrast, Noise Rejection, Color Palette, Screen Recording (.MP4 to SD card), Range Grid, Flip View, Mode Icon, Heading Offset.

StableView (Forward & Down) and Angle Offset are additional advanced options.

AT Wide (NSO4 & NSS4 Only)

When two ActiveTarget® 2 modules are detected, the AT Wide app appears for paired transducer views including Scout Wide, 180 View, and the industry-first Scout Live 360 view.

SideScan & DownScan™ — Scroll Speed Adjustment

Scroll speed of both SideScan and DownScan can now be adjusted to control how fast data moves across the screen.

• Increase scroll speed for faster boat speeds; decrease for slower speeds
• Menu > Scroll Speed > Adjust slider (up to ×8 faster or 1/9th slower)

Mercury® Premier Joystick Support (Introduced in 2.4)

Mercury Premier Joystick provides enhanced control with more refined hardware interfaces and advanced software for docking and low-speed maneuvering.

• Compatible with Next Gen DTS-compatible engines (outboards, Mercury Racing, sterndrive)
• Non-joystick vessels with Electric Steering + GPS/IMU can use Skyhook®, Heading Hold, and Position Hold
• Skyhook Reposition: Adjust position without disengaging Skyhook — move the joystick to reposition and Skyhook re-engages automatically
• Remote Station Skyhook Control: Engage/disengage Skyhook from a remote joystick station
• Advanced Hold Control: Engines engage selectively as needed rather than all at once

Mercury® Engine Control Bar — New Look

The Mercury engine control bar has an improved look and feel. Navigation modes (Auto-heading / Route) offer Precision High or Low control. Positioning modes include Active Skyhook, Position Hold, and Heading Hold.

Top row data in the information bar can be set between Voltage or Steering (Steering available on V12 engines only).

Mercury® Smart Tow

Mercury Marine Smart Tow is an integrated engine feature for watersports towing — wakeboarding, waterskiing, tubing, or wake surfing.

• Controls acceleration for smooth rider pull-up without surging
• Maintains a steady target speed once on plane, adjusting automatically for boat load and activity
• Users can control Smart Tow from the Mercury control bar: set target RPM, adjust up/down while underway, and choose a launch intensity profile

Mercury® Troll Interface (New)

New Troll mode selector showing active/inactive state and setpoint RPM. Controls include current RPM display, target RPM, RPM range indicator, and Start/Stop.

Yamaha® App — Overview

Yamaha® Command Link / Command Link Pro engine information can now be displayed in a native Yamaha App. When a compatible Yamaha® gateway is connected to the NMEA 2000® network, the Yamaha® features are unlocked and an icon appears on the Home screen.

Requirements: Gateway module (6YG-8A2D0-00-00) or Yamaha® CL7 Gauge on the NMEA 2000® network. Do not use both together on the same network.

Main Page Data (Configurable)

• Engine RPM (greyed out in Neutral)
• Boat Speed, Gear Position (F/N/R), Engine Trim
• Accessory battery voltage (house bank), Start battery voltage
• Tank levels: Dark blue = fuel, Light blue = fresh water, Orange = grey water, Green = generator fuel
• Engine gauges (user-configurable), Boat status info (user-configurable)
• Warning and alert icons

Setup & Configuration

• Number of engines: Set via Settings > Vessel Details > Number of Engines (not in the Yamaha app itself)
• Calibration: Menu > Calibration for trim level and fuel flow
• Boat status bar: Menu > Boat (layout varies by screen size and engine count)
• Engine gauges: Each engine has user-configurable gauges; choose data or select "None"
• Engine Hours & Maintenance Reset: Menu > Engine Hours; service interval reset per engine or all at once (after 100 hours, a maintenance required message appears)
• Factory Reset: Resets system engine count and gateway (requires all engines to be off)

Popular Data Types Group

Editing the Instrument Bar data panels is now easier with a new Popular group showing the most commonly used data types, reducing the time needed to find and assign frequently used instruments.

Native CZone App

The CZone app is now available as a native app on NEON displays — no additional hardware required.

• Runs natively on the MFD for exceptional performance
• Plug & play with an existing CZone system — reduces setup complexity
• Create and manage custom Favourites pages with the CZone Favourites Tool
• Unified user experience aligned with CZone Displays and tablet/mobile apps

Setup Process

1. In CZone config, add a Display Interface and assign a dipswitch for each MFD. In Module Settings, ensure "Switched Module Network Power" is checked.
2. Update the MFD to NEON 2.3.187 or newer.
3. Open the CZone app from the Home page — the config file is read from another CZone device on the network.
4. Select the dipswitch of the MFD from the dropdown. The app will populate pages from the configuration and become fully functional.
5. To load Favourites: Insert microSD card with a .cfp file, then in the CZone App: Settings > Advanced > Load a CZone Favourites Package.

Bug Fixes & Improvements

• Camera connectivity improvements
• FLIR® video performance improvement — reduced latency
• Fixed: Camera App icon not appearing when a camera is connected for the first time
• Fixed: NSS4 physical menu button not opening the IP-Camera app menu
• Fixed: Removed unsupported "Set New Park Position" from FLIR® menus
• Fixed: FLIR® Menu > Image > Camera motion speed now correctly shows 0–30 range from startup (previously 0–99 until touched)

Professional Autopilot Support (AC70 Family)

Simrad's professional AC70 autopilot computer can now be controlled from a NEON display.

Activation: Settings > Boat Network > Devices > Expand MFD list > Pilot Controller > three dots > Show Details > Scroll to Pro Autopilot > Enable Pro Autopilot Compatibility. Select station group as required. Repeat for other displays.

• Status bar shows autopilot mode and heading
• Controls: current heading, compass ribbon, work mode, set heading, rudder angle, 10° and 1° course change buttons, Engage/Standby
• Command transfer: request and take command from another station via the padlock/three-dots menu

Power-Pole Integration via C-Monster® Gateway

Power-Pole devices can now be controlled from NSX/NSS4/NSO4 when a C-Monster® gateway is connected to the NMEA 2000 network.

• Power-Pole Move® Trolling Motor: All Power-Pole Move trolling motors now controllable via the Trolling Motor Control Bar — anchoring or route following
• Power-Pole Shallow Water Anchor: Full shallow water anchor support

Software Rollback

It is now possible to revert the software to an older version using an SD card.

1. Edit the installer filename by adding .auto before the .upd extension — e.g. rename NSX-2.3.176.upd to NSX-2.3.176.auto.upd
2. Copy to the root of a microSD card (no other updates on the card)
3. Go to Settings > General > Software Updates
4. Select "Install now" for the file indicated by the microSD card icon and follow on-screen instructions

CHIRP Improvements on Select AIRMAR® Transducers

Sensitivity and target return strength improvements when using AIRMAR® High Wide and Medium CHIRP transducers.

Method 1 — Direct Internet (Wi-Fi / OTA)

Connect the NSX®/NSS®4 directly to the Internet. The MFD can download updates automatically. No SD card needed.

1. Settings > General > Software Updates
2. Auto download is enabled by default — when an update is available and connected, it will start automatically
3. Select Wi-Fi Connection to initiate manually
4. Follow on-screen instructions to install

Method 2 — SD Card / USB Drive

1. Download the updater file from www.simrad-yachting.com
2. Copy the .upd file to the root of a microSD card or USB drive (NSS4 / NSX 9" or 12")
3. With the MFD powered on, insert the microSD card or USB drive
4. An alert will notify you of the available update — press Update now, or go to Settings > General > Software Updates > Install Now
5. Follow the on-screen instructions

Method 3 — Simrad® Companion App

Create a Simrad account and register the NSX/NSS4 on the Companion app. When a new version is available, download it to your phone away from the boat, then transfer to the MFD when next on board.

After Updating

• After running the system for 10 minutes, power off the vessel and wait at least 1 minute before repowering
• Perform an Auto Source Selection: Settings > Boat Network > Sources > Auto detect all sources
• Ensure the Setup Guide is complete: Settings > Setup Guide
• Verify Boat / Vessel Settings: Settings > Your Vessel