Helm Guardian Lock - Marine GPS Theft Deterrent Device

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Protect your expensive marine electronics with the Helm Guardian Lock. This theft deterrent device gets placed over your marine display(s) when the boat is not in use to prevent thieves from stealing it. High quality anodized aluminum.
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Jim Maier
Head Honcho
Emily Powers
She talks the talk

Do you store your boat in an unattended storage lot or at a marina?  Do you have expensive marine electronics displays on your boat?  The ultimate bummer is arriving at your boat for a nice day on the water to find that your electronics displays have been stolen.  This scenario plays out over and over.  Marine Electronics theft is a major problem. Install a Helm Guardian Lock, to make sure thieves pass right over your boat and find another easier target. 

The Helm Guardian Lock is an anodized alumunum bar/assembly that gets placed over your marine electronics displays when the boat is not being used.  It simply slides into place and then gets locked with the push of a button.  Removal is just as easy.  All that is left behind when the Helm Guardian Lock is removed is two small anodized aluminum buttons about the size of a snap, to keep your dash looking clean.  Once installed and locked into place, it is impossible to remove with basic tools or in a timely manner, even if a thief gains access to the back of your dash. 

A Helm Guardian Lock is one thing a thief will not want to deal with when trying to be fast and quiet.  

The Helm Guardian Lock will fit all marine electronics that are flush mounted with a height off the dash less than 22.5mm or .9".  This is basically everything currently on the market except for Humminbird or the Lowrance Elite Series.  Brands it will fit include:

  • Simrad NSS Evo2
  • Simrad NSS Evo3
  • Simrad NSS Evo3S
  • Lowrance HDS Live
  • Raymarine Axiom (All Axiom variants)
  • Raymarine C & E Series (Classic and Wide)
  • All Garmin Echomap Plus and UHD units
  • All Garmin GPSMAP units
  • All Furuno Navnet Units since the VX2, not including VX2
  • Many other units*
*Please measure older units, or unit that appear to stand off the dash to ensure they are less than 22.5mm or .9" thickness from the dash.

BOE Marine is known for providing the absolute best installations on the brands we carry. We are pleased to expand our footprint in partnership with companies that share the same ideals as us. Listed below you will find our Installation Partners in key regions around the country. You can contact these companies directly and get the same great service you expect from BOE Marine. Through our partnerships you are able to order your equipment at the best prices, tax free, from our website. Then have one of our Installation Partners perform a high quality installation.

Our program is built upon a high degree of accountability. Our Installation Partners expect us to give great advice, prices, and supply all of the parts needed for the install. And we expect our Installation Partners to provide an expert installation in a timely manner and provide support for any equipment malfunctions or installation issues.

As the customer, you can be assured that you are buying from a dealer authorized in the brands we carry. And you will receive uncompromising advice and support on the local level from the Installation Partner, or via phone with BOE Marine. We feel there is no better package to get you the best pricing along with experienced local service.

Mid-Atlantic (MD, DE, DC)
Serviced by BOE Marine 866-735-5926

North Carolina (Lake Norman Area)

Serviced by BOE Marine of Lake Norman 866-735-5926

Florida West Coast (Tampa/St Pete Area)

Bluewater Custom Marine - 727-488-7171
Mobile Electronics Installation
St. Petersburg, FL
CONTACT: Martin Warren
Email: [email protected]

Fort Lauderdale - Miami Dade

Parker Yacht - 954-463-1515
225 SW 32nd Street
Fort Lauderdale, FL 33315
CONTACT: Ole Parker
Email: [email protected]

Palm Beach County

Marine Electronics Solutions - 561-427-1040
3866 Prospect Ave #8
West Palm Beach, FL 33404
CONTACT: Billy Byers
Email: [email protected]


HMS Marine Electric, LLC - 251-591-3283
400 Myrtle Avenue
Fairhope, AL 36532
CONTACT: Maclin Smith Jr.
Email: [email protected]

Cape Cod & Islands

Dempsey Marine Electronics & Electrical - 508-360-1094
234 Queen Anne Road #2
Harwich Mass 02645
CONTACT: Tom Dempsey
Email: [email protected]

Texas - Houston/Galveston & Surrounding Areas

Bill Platt Electronics - 409-739-3489
3501 Tallow Forest St
Dickinson, TX 77539
CONTACT: Bill Platt
Email: [email protected]

Washington DC / Occoquan

Jimmy's Mobile Marine
James Deuterman
9192 Big Springs Loop
Bristow, VA 20136
Email: [email protected]

Baton Rouge, LA

David Wade Marine
18150 Petroleum Dr
Baton Rouge, Louisiana
(225) 752-3789
Email: [email protected]


Spar Yard Marine
6 Spar Lane Sandy’s, MA01
Email: [email protected]

Long Island, NY

Jeff's Marine Electronics
8 Rugby Dr
Shirley, NY 11967
631-874-0070 or 631-469-1645 (cell)

Southern New Jersey

Jersey Boy Marine Electronics - 609-425-1676
Mobile Electronics Installation / FCC inspections
Cape May Court House, NJ
CONTACT: Robert Gauntt
Email: [email protected]

Installers - Do you have what it takes to be an Authorized BOE Installation Partner?  If you can demonstrate a proven track record of impeccable customer service and expert installations then we will consider adding you to this list in markets not already covered. Please email [email protected] to inquire.

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