The ACR SM-3 is an automatic man overboard marker light, or MOB light, for a lifebuoy. It turns on automatically upon contact with water, floats upright, and is 360-degree visible for approximately 3.2 kilometers. SOLAS and MED approved.
Marker light that turns on automatically and stays upright as soon as it hits the water The ACR SM-3 is a crew overboard marker light, also known as a man overboard or MOB light. If you throw a lifebuoy overboard, the light turns on automatically as soon as it touches the water. It is a high-intensity LED flasher that is visible all around for a distance of approximately 3.2 kilometers.
Two features make this light practical. It self-corrects and stays upright, ensuring the flash shines upward and sideways rather than into the water. And it lasts a long time: the light burns for more than 40 hours at 30 degrees and more than 24 hours at minus 1 degree. Even if the search takes hours, the light will still be burning.
The SM-3 is SOLAS-approved and MED-approved with Wheelmark. It runs on two AA lithium batteries, which are not included.
Why choose the SM-3 marker light?
Turns on automatically in water: no button that someone needs to find in a panic
Stays upright: the light self-corrects so the flash points in the right direction
360-degree visibility: visible all around for approximately 3.2 kilometers
More than 40 hours of burn time: at 30 degrees, and more than 24 hours at minus 1 degree
SOLAS and MED approved: with Wheelmark, suitable for professional use
Compact and robust: made for permanent use outdoors on deck
Who is this product for?
The SM-3 is intended for commercial shipping, petro-marine, charter vessels, and larger yachts where a reliable crew overboard light is mandatory or desired. It is also useful for smaller vessels that sail in the dark or in winter, regardless of type, because that is exactly when someone who has gone overboard can disappear from sight within a few seconds without a light.
What are the benefits for you?
The person overboard remains visible: even after you have had to turn the vessel
Works without anyone needing to do anything: water activation requires no action from the person overboard
Stays lit all night: more than enough for a long search operation
Meets requirements: SOLAS approved and MED certified with Wheelmark
Technical specifications
Product type
Crew overboard marker light for lifebuoy
Item number
3947
Model
SM-3
Light source
High-intensity LED flasher
Visibility
360 degrees, approximately 3.2 kilometers
Activation
Automatic upon contact with water
Buoyancy
Self-correcting and floats upright
Burn time
More than 40 hours at 30 degrees Celsius
Burn time in cold
More than 24 hours at minus 1 degree Celsius
Battery
Two AA lithium batteries, not included
Approvals
SOLAS approved, MED approved with Wheelmark
Brand
ACR
Additional features
Application
Commercial shipping, petro-marine, charter vessels, and cruisers
Batteries
Two AA lithium batteries are not included; keep a spare set on board
Why floating upright matters
A light lying on its side shines into the water and is much harder to see
Combine with
A lifebuoy and preferably a personal emergency beacon for the crew
Frequently asked questions
How does the SM-3 turn on?
Automatically, as soon as the light comes into contact with water. No action is required from the person who has gone overboard, which makes a big difference in cold water with stiff hands.
How long does the light stay on?
The light burns for more than 40 hours at 30 degrees Celsius and more than 24 hours at minus 1 degree Celsius. So, even during a long search operation in the cold, the light will still be burning.
Are the batteries included?
No. The SM-3 runs on two AA lithium batteries that must be purchased separately. Remember to check them during your annual safety equipment inspection.
Is this light suitable for professional use?
Yes. The SM-3 is SOLAS-approved and MED-approved with Wheelmark, making it suitable for commercial shipping.
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