ACR OLAS Guardian (Wireless Engine Kill Switch and MOB Alarm System)

ACR OLAS Guardian (Wireless Engine Kill Switch and MOB Alarm System)


The OLAS Guardian does exactly what its name suggests, guards over you whilst you out on the water with a lot of great features to give you the peace of mind and confidence to boat safely. One of the main dangers of falling overboard is that the vessel will continue moving away from you, and in just a few minutes when travelling at even a low knot speed you will find yourself out of shouting distance. The OLAS Guardian comes into its own in such situations, immediately powering down the vessel in an emergency.

ACR OLAS Guardian (Wireless Engine Kill Switch and MOB Alarm System)

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The device is especially useful in cases where you are the sole occupant of the vessel, as you don’t have to worry about your vessel moving without you onboard. This means no physical tether is needed to the kill switch, giving you the freedom to move as you please onboard. The device works across multiple styles of water vessel, from RIB and powerboats to motorboats and larger vessels. If you have multiple engines that need to be shut down, then there is a specialist accessory that works alongside the ACR OLAS Guardian to instantly disengage up to three different engines at once.


What happens if you go overboard?

The system is designed to work with a lightning fast response in a man overboard (MOB) incident. When you are wearing one of the ACR OLAS Tags on your wrist that is connected to the OLAS Guardian, should anything cause you to go overboard – losing your footing, hit by a large wave or knocked over accidentally – then in just two seconds the device will kick in and flip the kill switch on your vessel. In addition to the kill switch being triggered, a loud alarm will sound which will alert your crew.


The very act of the boat coming to a stop serves multiple purposes, not only will it protect you from the engine under the water if you fall near it, but it also lets every crew member know instantly something is not right. It will also prevent the vessel from moving too far from your location, allowing for a swift recovery.


When the OLAS devices are connected to a smartphone, you will also receive an alert there, as well as exact GPS coordinates and the time the incident occurred, making recovery much easier and more effective for your crew, or the emergency services.


ACR OLAS Guardian Key Features:

  • Wireless kill switch function
  • Loud alarm system with audio and visual features
  • Mobile connectivity with the app
  • Works with existing kill switch
  • Auto-restart after 5 seconds
  • Can be paused for out of range situations
  • 15 devices can be connected to cover every crew member
  • Hardwiring for continual power supply
  • Colour-coded switch for ease of use
  • App connected provides valuable GPS information
  • Completely waterproof
  • Bluetooth technology
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3.6” (H) x 3.5” (L) x 1.5” (W)/92 (H) x 90 (L) x 38 (W) mm


3.97 Ounces (112.5 g)


Black and Clear


Press button once to turn on, all tags within 2 meters are tracked

Maximum Number of Connected OLAS transmitter

Connects up to 15 OLAS Transmitters (OLAS Tags and/or OLAS Float-On)

Power / Current

10-32V / 13-17mA

Visual Alarm

Red LED / 55 Lumens

Audible Alarm

85 Decibels

Automatic Restart

After 5 Seconds

Automatic Connection

Automatically connects to any activated OLAS transmitter within a 2 meter range.

Relay Selection

Use the OLAS APP to select which crew members transmitters should trigger the engine cut off, or only trigger the Guardians built-in alarm.

MOB System

Track up to 15 different OLAS transmitters with 1 phone/tablet.  OLAS Transmitters can be tracked by an unlimited number of phones/tablets (Bluetooth 4.1 Compatible).


The ALARM sounds within 2 seconds of a Man Overboard situation and Shuts off the boats engines.  The system records the MOB location using your phone/tablets GPS and directs the boat back to the last known location for a quick and easy recovery.


Compatible with the ACR OLAS Extender, Mobile App, Float-On, and Tag.

Mobile App

IOS and Android (Free Download)

  • Connect multiple OLAS transmitters to 1 phone or tablet
  • Connect 1 OLAS transmitter to multiple phones / tablets
  • Solo Mode (Text Message Alerts to Emergency Contacts with GPS coordinates)

Download the ACR OLAS App on the App store or get it on Google Play: Search ‘ACR OLAS


For use with vessels up to 50 feet (12 meters).

Extend the coverage range on larger vessels with the ACR OLAS EXTENDER for coverage on boats up to 80 feet.


Upgrade your system with the ACR OLAS Extender (extends range of your MOB system from a vessel size of 50 ft up to 80 ft).




Yes (IP67)

Housing Material



1-3 Amp fuse recommended (not supplied)


4.2 + 5.0


Recreational and Commercial Boating

Accessories (Included)

ACR OLAS Tag, Power Connection Cable, Kill Switch Cord Connector, and Stainless Steel Control Switch


FCC, RED, CE, RoHS 2.0



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