Introducing the ACR SM3 Lifebuoy Marker Light—a compact MOB beacon designed for commercial maritime operations. It delivers 360° visibility up to about 2 miles and activates automatically when it hits the water, ensuring signaling is immediate when every second counts.
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Model: SM-3
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Activation: Automatic gravity switch; automatically activates and begins flashing when placed in water or upright
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Light & Visibility: Ultra-Bright LED with 360° visibility; minimum of 3 candelas per flash; 50–70 flashes per minute; reaches up to about 2 miles
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Durability: UV-resistant polycarbonate housing; floats upright and buoyant; drop-tested to 76 meters; color International Safety Orange
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Size & Weight: Length 9.9" (253 mm); Diameter 2.2" (56 mm); Weight – light only 0.66 lb (300 g); with batteries 0.71 lb (330 g); with batteries & bracket 0.90 lb (406 g)
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Batteries: 2 AA Lithium Batteries (L91); user replaceable; not included
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Power & Runtime: 40+ hours at 30°C (86°F); 24+ hours at -1°C (30°F)
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Mounting: Includes UV-resistant polycarbonate mounting bracket; retrofit-ready with the same hole pattern as SM-2; no adapter plate required
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Standards: USCG/MED/SOLAS approved for worldwide use
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Applications: Commercial maritime use including petro-marine, workboats, cruise liners, tugs, supply vessels, cargo vessels, passenger vessels, fishing charters, and more
The SM-3 delivers reliable MOB signaling with a water-activated, self-igniting design that minimizes downtime in emergencies. Its rugged construction, long runtime, and retrofit-ready bracket make upgrading safety gear straightforward, while its worldwide approvals support compliance across a wide range of vessels and operations.
| Name |
SM-3 Lifebuoy Self-Igniting Marker Light |
| Product Description |
Strobing Crew-Overboard Marker Light |
| Model Number |
SM-3 |
| Application |
Commercial maritime applications including petro-marine, workboats, cruise liners, tugs and workboats, supply vessels, cargo vessels, passenger vessels, fishing charters etc. |
| Size |
| Length |
9.9" (253 mm) |
| Diameter |
2.2" (56 mm) |
| Weights |
| Light Only |
0.66 lbs (300 g) |
| Light with Batteries |
0.71 lbs (330 g) |
| Light with Batteries & Bracket |
0.90 lbs (406 g) |
| Batteries |
2 AA Lithium Batteries (L91) / User Replaceable (Not Included) |
| Material |
UV Resistant Polycarbonate |
| Color |
International Safety Orange |
| Activation |
Automatic gravity switch |
| Operation |
Throw SM-3 overboard or turn upright and strobe light will automatically begin to flash |
| Light Intensity |
Minimum of 3 candelas per flash in all directions of upper hemisphere |
| Visibility |
360o visibility |
| Flash Rate |
50—70 times per minute |
| Buoyant |
Yes |
| Lamp |
Ultra-Bright LED |
| Operational Life |
40 hours over 3 cd at 30oC (86oF) |
| Drop Test |
Drop tested to 76 meters (USCG/SOLAS/MED only call for 30 meters) |
| Warranty |
1 year |
| Mounting Bracket |
UV resistant polycarbonate bracket included / Same mounting hole pattern as previous SM-2 Model for easy retrofit |
