GOST NT-Evolution Hard-Wired Security w/Outboard Cowling Sensor
GOST NT-Evolution Hard-Wired Security w/Outboard Cowling Sensor — Product description
GOST's hard-wired marine security and satellite tracking package configured for outboard-powered boats, with an engine cowling sensor that triggers if the cowling is removed. Real-time GPS location, satellite messaging via the IDP 100x backbone, a hard-wired sensor kit (door/hatch contact, IR beam, high water, outboard cowling), a 125 dB siren, an LED strobe, and a water-resistant keyfob.
This variant of the GOST NT-Evolution package is built for outboard-powered boats where engine theft is a real concern. The 110V shore-power monitor in the standard NT-Evolution kit is replaced here with a GDC EXT WGHD door/hatch contact configured as an Engine Cowling sensor (Zone 4 NC). The contact mounts under the outboard engine cowling, and if the cowling is removed, the contact opens and the system triggers an alarm. For triple-outboard center consoles, sport-fishing walkarounds, and any other boat where the engines are the most expensive single item on the dock, this is the kit that watches them when the boat is unattended.
The rest of the system is the full GOST NT-Evolution build. The IDP 100x satellite backbone keeps the system online globally, which is what separates a true marine security system from a residential alarm panel adapted to a yacht. If somebody steals the boat or it breaks free on a mooring in a storm, you get a real-time GPS position and an alert on your phone within seconds, anywhere on Earth. The GDC EXT WGHD door/hatch contact in its primary role secures the companionway hatch and cabin access points. The GNT IBS 1 IR beam sensor pair protects the perimeter of the boat. The GMM HWS high-water bilge float switch sits slightly below the factory-installed high-water alarm, giving a second warning level before the bilge actually fills.
Output devices match the standard kit. The GA STROBE WHITE strobe is the visual alarm: ultra-small, surface or internal mount, semi-hemispheric white LED with 25 flash patterns plus a synchronize feature for running multiple strobes in alternating or matched flash. The GA-MINI-SIREN is the audible alarm: 125 dB at 20 watts, multi-tone, water-resistant. Loud enough to be heard from the next slip over and persistent enough to actually deter rather than just annoy a thief into cutting the wires faster. Both devices are wired through the GOST panel and triggered by any zone trip.
The user interface is the GMM KF2 keyfob: water-resistant, compact, backlit buttons with auditory feedback. The fob handles up to six actions per remote control with a range of about 150 feet, which is enough for the dock-to-boat walk plus the parking lot at most marinas. Arming and disarming without pulling out a phone is the workflow most owners want, especially when you're stepping off the boat with hands full of fishing gear or coolers. The hard-wired zones map cleanly to the GOST panel: Hatch on Z2 (NC), Beam Sensor on Z3 (NC), Engine Cowling on Z4 (NC), and High Water on Z5 (NO). The ComBUS four-wire connection links the sensors to the panel through clean low-voltage runs rather than individual home runs to each device.
Install considerations are the same as the standard NT-Evolution kit. This is an installer-grade marine security system rather than a DIY weekend project. The wired runs through the boat, the antenna placement for the IDP 100x satellite link, the strobe and siren mounting locations, and the panel power feed all need to be done right to avoid false alarms and missed alerts. The outboard cowling sensors specifically need to be mounted where the engine technician can still access the engine for service without triggering the alarm every time, which is usually the inboard side of the cowling near the rear corner. We can recommend an installer in your area and walk you through sensor placement before you commit. Note from the manufacturer: this product cannot be returned to the original point of purchase, and warranty service goes through GOST directly.
One pattern worth knowing on outboard cowling sensors specifically. Marina theft of outboards has gotten organized enough that thieves work fast: cut the cowling latches, swing the cowling, unbolt the engine off the transom, drop it onto a truck bed, and they're gone in five minutes. The cowling sensor is what shortens that window to seconds. The moment the cowling lifts, the GOST satellite alert hits your phone, the siren goes off at the dock, the strobes flash visibly from the parking lot, and the local marina security is notified if you've set that up in the alert routing. None of that catches every theft, but it changes the economics enough that organized thieves usually move on to the next boat without one. For owners on docks where outboard theft has been a problem, the OB variant of NT-Evolution is the most cost-effective marine security upgrade we sell.
Key Features
- Hard-wired marine security and tracking system with IDP 100x satellite backbone
- Real-time GPS location tracking with global coverage
- Outboard engine cowling sensor for theft prevention on outboard-powered boats
- Door/hatch magnetic contact for companionway and cabin access points
- Infrared beam sensor for vessel perimeter protection
- Bilge high-water float switch as second-level warning
- 125 dB multi-tone water-resistant siren (20W)
- Surface or internal mount LED strobe with 25 flash patterns and sync mode
- Water-resistant backlit keyfob with 150-foot range and 6 actions per remote
- Four-wire ComBUS sensor backbone for clean wiring
- Five zones mapped (hatch, beam, engine cowling, high water, ComBUS)
Why Buy from NVN Marine
- Authorized GOST reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Outboard cowling theft is the single biggest claim on most marine security policies, and the OB variant of NT-Evolution is built around it. Tell us the engine count, the boat layout, and the marina situation, and we'll confirm the kit size before you order. For multi-outboard boats we'll spec the additional cowling sensors as add-ons.
Technical specifications
| Title | GOST NT-Evolution Hard-Wired Marine Security with Outboard Cowling Sensor |
|---|---|
| Manufacturer Part Number | GNT-EVOLUTION-SM-IDP-HW-OB |
| Brand | GOST |
| UPC | 850047519139 |
| System Type | Hard-wired marine security, monitoring, and satellite tracking |
| Communications Backbone | GOST IDP 100x satellite messaging (subscription required) |
| Tracking | Real-time GPS location |
| Engine Cowling Sensor | GDC EXT WGHD contact configured for outboard cowling |
| Door/Hatch Contact | GDC EXT WGHD water-resistant magnetic contact |
| Perimeter Sensor | GNT IBS 1 infrared beam emitter and receiver pair |
| High Water Sensor | GMM HWS bilge float switch with bracket |
| Siren | GA-MINI-SIREN, 125 dB, 20W, water-resistant, multi-tone |
| Strobe | GA STROBE WHITE LED, 25 flash patterns, sync feature |
| Keyfob | GMM KF2, water-resistant, backlit, 150-foot range, 6 actions |
| Sensor Backbone | ComBUS four-wire |
| Zones | Hatch Z2 NC, Beam Z3 NC, Engine Cowling Z4 NC, High Water Z5 NO |
| Installation | Professional install recommended |
| Returns | Not returnable to original point of purchase per manufacturer |
Frequently asked questions
What's different about the OB variant?
The OB variant swaps the 110 AC shore-power monitor for an outboard engine cowling sensor on Zone 4. Everything else in the kit is the same. If your boat is outboard-powered and engine theft is what you're worried about, this is the variant you want. If your boat is inboard-powered and you want to monitor whether shore power has dropped, the standard NT-Evolution kit is the right fit.
Does it actually work via satellite or is it just a cell-based system?
Satellite. The IDP 100x backbone keeps the system online globally without cellular coverage. That matters on boats moored in remote anchorages or stolen and driven out of cell range. Cell-based systems disconnect the moment the boat leaves coverage. The satellite link keeps reporting the boat's position to you regardless.
Do I need an active subscription?
Yes. The satellite communications require an active GOST monitoring subscription for the IDP 100x service. Pricing varies by message frequency and feature level. We can walk you through the subscription tiers before you commit to the hardware kit so you have a full picture of ongoing cost.
Will it work on a triple-outboard or quad-outboard boat?
The kit ships with one cowling sensor. For multi-outboard boats you want one sensor per engine, which means adding additional GDC EXT WGHD contacts to the kit on extra zones. The GOST panel handles the additional zones natively. We can spec the right additional sensors based on your engine count.
Where exactly does the cowling sensor mount?
Inside the outboard cowling, typically on the inboard side at the rear corner where it's protected from spray but still reachable for service access. The installer fits the sensor and the magnet so removing the cowling fully opens the contact and triggers the alarm. A small partial-opening (like the inspection access on some cowlings) shouldn't trigger if mounted correctly.
Will routine engine service trigger the alarm?
If the system is armed when the technician removes the cowling, yes. Most owners disarm the boat before scheduled service. The system supports multiple arming modes so you can choose a partial arm that excludes the cowling zone while the boat is still alarmed against intrusion through the cabin or perimeter. Configuration is done at install.
Can it call my phone?
Yes. The GOST monitoring system supports SMS alerts, email alerts, and app push notifications when any zone trips. Alert routing is configurable through your GOST account. Most owners set up SMS plus app notification for fastest response.
What boat size is this kit sized for?
Mid-to-large outboard-powered cruising and sport-fishing boats roughly 30 to 60 feet. That's the sweet spot for a single cabin hatch zone plus the perimeter beam plus the engine cowling sensors. Larger yachts usually want additional zones (motion sensors, multiple cabin doors, fuel monitoring) and a larger GOST panel.
How long is the keyfob range?
Up to 150 feet in clear line of sight. Marina docks and metal structures can reduce that. Most owners report reliable operation from the dock to the boat and from the parking lot to the dock, which is the usable workflow.
Is this returnable?
Per the manufacturer, this product cannot be returned to the original point of purchase. Warranty and any defect issues go directly through GOST. We'll help you coordinate warranty service if you need it. We'd also strongly suggest sizing the kit correctly the first time, which is why we encourage the install conversation up front.
