ACR FireFly PRO Waterbug SOLAS Water-Activated Strobe Light 3971.3

ACR FireFly PRO Waterbug – SOLAS Water-Activated Rescue Strobe

A compact emergency signalling light for lifejackets, survival bags and personal marine safety equipment. The Waterbug version can activate automatically on contact with water when armed, while its manual controls provide strobe, SOS strobe and steady-light functions for different stages of a rescue.

Where and When It Is Used

• Attached to an inflatable or foam lifejacket for man-overboard visibility.
• Stored in a grab bag, liferaft pack or abandon-ship kit.
• Suitable for sailing yachts, motorboats, RIBs, commercial fishing vessels, charter craft, workboats and larger vessels.
• Useful for night-time, poor-visibility and close-range recovery signalling.

Key Performance

• Water activation: automatic activation when the Waterbug is armed and immersed.
• Manual light functions: high-intensity strobe, SOS strobe and steady-on.
• Light output: cool-white LED, 360° beam, 41 candela strobe intensity.
• Visibility: more than 3 miles in suitable conditions.
• Strobe duration: over 56 hours with suitable AA lithium batteries.
• Steady-light duration: up to 28 hours with suitable AA lithium batteries.
• Flash rate: approximately 60 flashes per minute.

Technical Specifications

Installation and Use

Use the two lashing points and supplied hook-and-loop strap to secure the light where it remains visible and accessible. Before departure, fit fresh compatible batteries, check the controls and place the selector in the armed position only when automatic water activation is required.

Safety note: this is a visual distress-signalling aid. It does not replace a PLB, EPIRB, AIS MOB beacon, approved lifejacket or other equipment required for the vessel and voyage.

What’s Included

• ACR FireFly PRO Waterbug rescue strobe light
• Hook-and-loop mounting strap
• Retail card packaging

Not included: AA batteries.

Frequently Asked Questions

Does it switch on automatically in water?
Yes. The Waterbug version supports automatic water activation when the unit is correctly armed.

Can it also be operated manually?
Yes. Strobe, SOS strobe and steady-on functions can be selected manually.

Is it suitable for a lifejacket?
Yes. Its compact housing, twin lashing points and supplied strap are designed for mounting to a lifejacket, belt or survival pack. Mount it so the light is not obscured.

Are batteries supplied?
No. Two AA batteries are required; follow the ACR instructions and use fresh compatible batteries. The published endurance figures are based on AA lithium batteries.

Is this the manual-only FireFly PRO SOLAS model?
No. This listing is for the 3971.3 Waterbug version with water activation.