ACR 3940 SM-2 Marker Light

Automatic crew overboard marker light

With 70,000 peak candlepower, the ACR 3940 SM-2 Marker
Light clearly mark crew-overboard sites with each
brilliant flash.The SM-2 is the industry standard for buoy lights.
Its durability is put to the test every day on ships and oil rigs
around the world. ACR has long solved the issue of condensation in
buoy lights which is a common occurrence on some other brands. The
supplied mounting bracket holds the SM-2 secure in the roughest of
conditions but it is still readily accessible when needed in an
emergency. With its easily replaceable 6 volt lantern battery power
source, the SM-2 will give years of service and be ready when
called upon.

A matter of balance
Marker lights, by design, need to float upright for maximum
visibility. The 6-volt lantern batteries provide the ballast for
these lights. Although batteries may be the same size, the
different chemistries cause them to have varying weights. It is
imperative that only the 6-volt battery models suggested are used.
Too little ballast and the light will lie over on its side and be
ineffective; too much weight and the light may sink. If there are
any doubts as to the appropriate weight of the battery, test the
light by placing it in shallow water. If it floats upright, it is
good, however, if the SM-2 sinks, the battery is too heavy.

ACR 3940 SM-2 Marker Light Features:

• Brighter light in all directions
• Upgraded polycarbonate blend case, improved impact rating; UV,
  temperature and chemical resistant
• Perfect for commercial marine, petro-marine, divers, cruisers,
  and any application needing a reliable COB light
• Automatically rights itself and activates when in the
  water
• High intensity Xenon strobe gives 360° visibility for more than
  3 miles (4.8 km)
• Floats upright in all conditions
• Minimum 36 hours continuous operating life

ACR 3940 SM-2 Marker Light Specifications:

• Size(LxWxH): 13.8” x 4.8” (35 x 12 cm)
• Weight: 1.75 lbs (794 g), 3.94 lbs (1.13 kg) with
  battery
• Material: UV stable polycarbonate blend
• Colour: International orange
• Operation: Throw unit overboard or turn upright and light will
  begin to work
• Waterproof: Drop tested 100 ft (33 m) into water
• Battery Type: 6V Lantern style battery
• Beam Angle: Omnidirectional 360°Visibility360° visibility for
  over 3 miles (4.8 km)
• Flash Rate: 60/minute
• Lamp: Xenon flash tube

Suggested Battery Types, Screw Terminal
Batteries:

• ANSI/NEDA: 915, 915C, 915D, 915AC
• Duracell: M915, PC915
• Rayovac: 942, 944
• Eveready: 510S

ACR 3940 SM-2 Marker Light Operation Manual