{"product_id":"acr-3947-sm-3-lifebuoy-self-igniting-marker-light","title":"ACR 3947 SM-3 Lifebuoy Self-Igniting Marker Light","description":"\u003cp\u003eThe ACR SM-3 Lifebuoy Self-Igniting Marker Light 3947 is a SOLAS, MED and USCG-approved high-intensity LED strobe designed to mark a crew-overboard position. When released from its mounting bracket and turned upright, the built-in gravity switch automatically activates the strobe. The buoyant light self-rights in the water and provides 360-degree visibility for approximately two nautical miles, helping rescuers maintain visual contact with the incident location.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eACR product number: \u003cstrong\u003e3947\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eModel: \u003cstrong\u003eSM-3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh-intensity LED crew-overboard marker strobe\u003c\/li\u003e\n\u003cli\u003eUSCG, MED and SOLAS approved\u003c\/li\u003e\n\u003cli\u003eAutomatic activation through an internal gravity switch\u003c\/li\u003e\n\u003cli\u003eSelf-righting, buoyant design floats upright\u003c\/li\u003e\n\u003cli\u003eProvides 360-degree visibility for approximately two nautical miles\u003c\/li\u003e\n\u003cli\u003eMinimum light intensity of 3 candelas\u003c\/li\u003e\n\u003cli\u003eFlash rate of approximately 50–70 flashes per minute\u003c\/li\u003e\n\u003cli\u003eOperates for at least 40 hours at 30°C or 24 hours at -1°C\u003c\/li\u003e\n\u003cli\u003eUV-resistant polycarbonate housing in international safety orange\u003c\/li\u003e\n\u003cli\u003eIncludes a mounting bracket with the same mounting-hole pattern as the earlier ACR SM-2 bracket\u003c\/li\u003e\n\u003cli\u003eRequires two user-replaceable AA Energizer L91 lithium batteries\u003c\/li\u003e\n\u003cli\u003eBatteries are not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIntended Use\u003c\/h2\u003e\n\u003cp\u003eThe SM-3 is intended for installation beside a lifebuoy or ring buoy as a crew-overboard position marker. It is suitable for commercial vessels, workboats, passenger vessels, cargo vessels, fishing vessels, tugs, offshore operations, charter boats, cruisers and other vessels requiring an approved self-igniting lifebuoy light.\u003c\/p\u003e\n\n\u003ch2\u003eFitment and Approval Notice\u003c\/h2\u003e\n\u003cp\u003eConfirm the vessel’s applicable Transport Canada, USCG, SOLAS, flag-state and inspection requirements before installation. Mount the supplied bracket where the light remains secure in normal operation but can be released immediately with the associated lifebuoy during a crew-overboard emergency.\u003c\/p\u003e\n\u003cp\u003eThe light measures approximately 253 mm long by 56 mm in diameter. Its bracket uses the same mounting-hole pattern as the discontinued ACR SM-2, allowing many existing SM-2 installations to be upgraded without an additional adapter plate.\u003c\/p\u003e\n\n\u003ch2\u003eWhen This Product Needs Replacement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe housing, lens or mounting bracket is cracked or damaged.\u003c\/li\u003e\n\u003cli\u003eThe light does not activate reliably when turned upright.\u003c\/li\u003e\n\u003cli\u003eThe strobe is weak, intermittent or fails its inspection test.\u003c\/li\u003e\n\u003cli\u003eThe unit no longer self-rights or floats upright correctly.\u003c\/li\u003e\n\u003cli\u003eBattery contacts show corrosion or contamination.\u003c\/li\u003e\n\u003cli\u003eThe approval markings or identification label are unreadable.\u003c\/li\u003e\n\u003cli\u003eThe manufacturer or applicable marine authority requires replacement based on service age.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstall two AA Energizer L91 lithium batteries before placing the light in service.\u003c\/li\u003e\n\u003cli\u003eObserve the battery polarity markings inside the housing.\u003c\/li\u003e\n\u003cli\u003eSecure the light in the supplied bracket with the lamp end facing downward so it remains deactivated during storage.\u003c\/li\u003e\n\u003cli\u003ePosition the bracket where the light can deploy with the associated lifebuoy without snagging on rails, lines or vessel equipment.\u003c\/li\u003e\n\u003cli\u003eTest the gravity-switch operation according to the ACR instructions and the vessel’s safety-equipment inspection schedule.\u003c\/li\u003e\n\u003cli\u003eReplace the batteries after emergency operation and whenever required by the inspection or battery-replacement schedule.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAlternate\/Superseded Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCurrent product number: \u003cstrong\u003e3947\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eModel designation: \u003cstrong\u003eSM-3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe SM-3 is the current replacement for the discontinued ACR SM-2 lifebuoy marker light.\u003c\/li\u003e\n\u003cli\u003ePrevious SM-2 reference: \u003cstrong\u003e3940.1\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insight\u003c\/h2\u003e\n\u003cp\u003eThe automatic function depends on the light being stored in the correct downward orientation and turning upright when deployed. Check the bracket position, battery condition and gravity-switch activation regularly rather than waiting until the vessel’s annual safety inspection. For compatible lifebuoys, mounting brackets and related safety equipment, see below.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lifebuoy-holder-stainless-steel-for-ring-horseshoe-lifebuoy-light\"\u003eLifebuoy Holder – Stainless Steel (Ring\/Horseshoe \u0026amp; Light)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/life-buoy-holder-ring-horseshoe-lifebuoy-mounting-bracket\"\u003eLife Buoy Holder – Ring \u0026amp; Horseshoe Mounting Bracket\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lalizas-stainless-steel-horseshoe-lifebuoy-bracket-with-light-base\"\u003eLALIZAS Stainless Steel Horseshoe Lifebuoy Bracket with Light Base\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/stella-lifebuoy-led-light-solas\"\u003eSTELLA Lifebuoy LED Light – SOLAS\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lifebuoy-light-w-brk-l90-solas\"\u003eLifebuoy Light with Bracket L90 – SOLAS\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/30-lifering-4-0kg\"\u003e30\" Life Ring – 4.0 kg\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/30-lifering-2-5kg\"\u003e30\" Life Ring – 2.5 kg\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lalizas-lifebuoy-ring-case-set-71285\"\u003eLalizas Lifebuoy Ring Case Set\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lifebuoy-ring-container-standard-white-wall-mount-storage-box\"\u003eLifebuoy Ring Container – Wall-Mount Storage Box\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51186634129444,"sku":"33-3947","price":434.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/79850a27-1ee4-4224-98c0-8422667fd00c.png?v=1785349120","url":"https:\/\/marisolmarine.com\/products\/acr-3947-sm-3-lifebuoy-self-igniting-marker-light","provider":"Marisol Marine Company","version":"1.0","type":"link"}