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ACR Electronics 3947 MOB Beacon SM-3 Automatic LED Strobe Marker Light

Manufacturer

Acr Electronics

<h3>About ACR Electronics</h3><p>When lives are on the line, professionals and adventurers around the world reach for ACR Electronics. <strong>Founded in 1956</strong>, ACR has spent nearly seven decades engineering survival and safety electronics with a singular purpose: to bring people home. From the depths of the ocean to the cockpits of aircraft, ACR's products have earned the trust of NASA, the U.S. Military, the U.S. Coast Guard, and countless everyday explorers.</p><p>ACR Electronics designs and manufactures a comprehensive range of rescue and signaling technology for the marine, aviation, outdoor, and military markets. Their lineup spans rescue beacons, communication devices, and high-powered lighting solutions — all built to perform when conditions are at their most demanding. Whether you're an offshore sailor, a backcountry hiker, a bush pilot, or a commercial fisherman, there's an ACR product engineered for your environment.</p><h3>Emergency Beacons &amp; Locating Devices</h3><p>ACR is perhaps best known for its industry-leading <a href="/7223-acr-electronics-epirbslocating-beacons-200377">EPIRBs and personal locating beacons</a>. Their GlobalFix EPIRB series combines 406 MHz satellite connectivity with Automatic Identification System (AIS) functionality, transmitting distress signals to the global Cospas-Sarsat satellite rescue network while simultaneously broadcasting AIS messages on VHF frequencies to nearby vessels. Features like Return Link Service (RLS) — which provides direct-to-beacon confirmation that a distress signal has been received — and Near Field Communication (NFC) for smartphone diagnostics represent the cutting edge of rescue beacon technology. Their ResQLink Personal Locator Beacon line brings similar technology into a compact, buoyant, subscription-free package for individual users on land or water.</p><h3>Marine Lighting &amp; Searchlights</h3><p>ACR's lighting lineup is equally impressive. Their <a href="/7223-acr-electronics-remote-control-spotlights-200861">remote control spotlights</a> are engineered for serious marine use, offering the ability to switch seamlessly between floodlight and spotlight modes with precision remote joystick control — ideal for night navigation, search and rescue, or docking in tight quarters. For boaters who prefer a handheld solution, ACR's <a href="/200510-handheld-spotlights-accessories-acr-electronics-7223">handheld spotlights and accessories</a> deliver powerful, portable illumination with the durability to handle harsh marine environments.</p><h3>Marine Communication</h3><p>Reliable communication is a cornerstone of on-water safety, and ACR's <a href="/201143-vhf-radios-handheld-acr-electronics-7223">handheld VHF radios</a> are built to meet that need. Their GMDSS-certified VHF radios are fully waterproof, IMO and SOLAS compliant, and engineered to provide clear voice communication in both routine and emergency situations. Models like the SR203 Survival Radio automatically tune to emergency Channel 16 upon activation, putting distress communication literally at your fingertips.</p><h3>Electrical Parts &amp; Accessories</h3><p>To keep your safety gear functioning at peak performance, ACR also offers a range of <a href="/7223-acr-electronics-electrical-parts-accessories-200355">electrical parts and accessories</a> — including power cables, connectors, battery replacement services, and light bulbs compatible with their searchlight and beacon product lines. These components ensure that your ACR equipment is always ready for deployment when it matters most.</p><p>From the mountains to the open ocean, ACR Electronics remains the benchmark for life-saving technology — a brand where innovation and reliability are never optional.</p>

Part Number

3947
09/15/2036 5:11 AM
Sale Price

$154.06

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The ACR Electronics 3947 MOB (Man Overboard) Beacon SM-3 is a self-igniting LED strobe marker light designed to facilitate rapid rescue operations in emergency situations. This life buoy marker light automatically activates when it comes into contact with water, providing a bright, attention-grabbing strobe signal that helps rescue teams quickly locate individuals in distress.

Key Features:

  • Automatic water activation with manual override capability
  • High-intensity LED strobe visible for miles in dark conditions
  • 40 hours of continuous operation at 86°F (30°C)
  • 24 hours of continuous operation at 30°F (-1°C)
  • Compact design: 2.2 inches diameter x 9.9 inches length
  • USCG, MED, and SOLAS certified for commercial and recreational marine use
  • Includes durable polycarbonate mounting bracket
  • Powered by 2 AA lithium batteries (sold separately)

This versatile marker light is ideal for life rings, life buoys, and other life-saving equipment on commercial vessels, pleasure craft, and offshore platforms. The rugged construction and reliable automatic activation make it an essential piece of safety equipment for any marine environment. The included bracket allows for secure mounting to various life-saving devices, ensuring the beacon is ready when needed most.

Products specifications

Diameter

2.2"

Length

9.9"

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