GOST-DC Wireless Marine Door & Hatch Sensor

The GOST-DC is a wireless door and hatch contact sensor built for the way boats actually get broken into. Somebody pops a cabin door, lifts an engine hatch, or cracks open a deck locker while the boat sits unattended at the dock. This little contact catches that moment and reports it back to your GOST security system, so you know the second something opens that shouldn't.

It's a two-piece magnetic contact. One half mounts to the frame, the other to the door or hatch itself. When the two separate, the sensor fires. The magnet and the transmitter don't touch, so there's no wear point to fail. Simple, proven, and exactly what you want guarding an entry point. There's nothing to fuss with once it's set.

Think about every opening on your boat that a thief or a curious dockwalker could use. The companionway. The cabin door. Engine room hatches. Lazarettes and cockpit lockers where you stash electronics and tackle. Add one to the outboard well or the battery compartment too if that's where your valuables live. Each one is a good candidate for a GOST-DC. Because it's fully wireless, you can protect openings that would be a nightmare to hard-wire, and you can add contacts as you go instead of running cable through the bilge.

That wireless design is the whole point. No drilling long runs, no fishing wire behind a headliner, no splicing into the boat's DC system. The GOST-DC is battery powered and talks to your base station over the air, with a signal range of up to 115 feet. On most powerboats and smaller sailboats that covers the whole vessel from a single station. On a bigger boat, or one with a cored or metal hull, expect the real-world range to come down, since all that structure eats into RF. If you're rigging up a larger yacht, plan on a repeater to bridge the gaps.

It's waterproof, so you're not limited to dry cabin spaces. Mount it on an exposed deck hatch or a cockpit locker and it'll shrug off spray and rain. One tip from experience: hit the battery and antenna contacts with a little dielectric grease before you close it up. The seal holds fine, but salt air will find any bare metal connection over a season, and a dab of grease keeps corrosion from creeping in. For the mount itself, we like quality VHB tape backed up with a bead of marine sealant. Screws alone tend to work loose on a hatch that slams around in a chop.

This version ships without the LED status indicator. That means there's no little light on the sensor blinking its state. You check arm and open status from your GOST base station or app instead, which is honestly where you'll be looking anyway. During install it's worth walking through an open-and-close test at the station so you can confirm each contact is talking before you button everything up.

One more real-world note. Contacts on a flexing hatch or a loose companionway board can throw the occasional false trip if there's a lot of play in the opening. Mount both halves on solid, well-aligned surfaces and keep the gap tight when closed, and you'll get clean, reliable triggers. Do it right and this sensor just disappears into the background, doing its job every time you step off the boat.

Paired with the rest of your GOST security and monitoring gear, the GOST-DC turns every door and hatch into a monitored entry point. It's a small piece of a serious system, and it's the kind of quiet insurance that lets you leave the boat and actually stop thinking about it. Set it once, and it keeps watch whether you're across the marina or across the country.